Grayfia Lucifuge (グレイフィア?ルキフグス, Gureifia Rukifugusu) is the wife and Queen of Sirzechs Lucifer and the mother of Millicas Gremory. She is the elder sister of Euclid Lucifuge and the sister-in-law of Rias Gremory. Renowned as the Strongest Queen and the Silver-Haired Queen of Annihilation, she was the only member of Sirzechs’ peerage to remain behind following the Evil Dragon War. Born a high-ranking Devil noble and former heiress of the Lucifuge Clan, Grayfia possesses a calm, dignified, and refined personality, adhering strictly to etiquette and discipline. She is composed, serious, and authoritative, carrying herself with the grace expected of a Queen and noblewoman. In her role as Sirzechs’ wife, Grayfia is often exasperated by his behavior and prefers to separate her professional duties from her personal relationship. She frequently avoids public acknowledgment of their marriage while on official business. Although typically composed, she has been noted to behave unpredictably when intoxicated, a trait humorously acknowledged by those close to her. Despite her strict demeanor, Grayfia is fundamentally kind, wise, and deeply devoted to her family. She takes pride in serving the Gremory household and fulfills her responsibilities with sincerity and dedication. As an older sister and mentor figure, she is caring yet firm, holding high expectations for those under her guidance. She is especially strict with Rias, often reprimanding her to help her grow into a responsible and capable noble leader. Likewise, she showed no hesitation in sternly confronting her brother Euclid when his actions endangered others. Beneath her composed exterior, Grayfia possesses a vulnerable emotional side closely tied to her loved ones. She was deeply affected by the loss of her father during the Devil Civil War and later fell into quiet despair after Sirzechs sealed himself away, leaving her behind for an extended period. She get comfort from hugging her son Millicas.

Sona Sitri (ソーナ?シトリー, Sōna Shitorī) is the former heiress of the Sitri Clan, assuming the position after her older sister, Serafall Leviathan, became one of the Four Great Satans. She is the youngest daughter of Lord Sitri and Lady Sitri, a first-year college student at Kuoh Academy, the former President of Kuoh Academy’s Student Council, and a childhood friend and long-standing rival of Rias Gremory. At Kuoh Academy, she is known under the alias Souna Shitori (支取 蒼那) and is ranked as the third most popular girl at the school, behind Rias and Akeno Himejima. Following her father’s illness, Sona was compelled to take on the role of the current Head of the Sitri Clan. She is characterized by her strict, disciplined, and highly serious demeanor, showing little tolerance for mistakes whether in Student Council matters or clan affairs. She holds both herself and her subordinates to high standards and expects absolute responsibility from those under her command. Sona is deeply committed to reform and education, aspiring to establish a Rating Game School open to Devils of all social classes. Her goal is to dismantle long-standing class barriers within Underworld society by providing equal educational opportunities, particularly for lower-class Devils. While resolute in her ideals, she has also shown moments of vulnerability, especially when political pressure surrounding her ambitions risked negatively impacting her sister, causing her significant inner conflict. Despite her stern exterior, Sona is fundamentally kind, generous, and compassionate. She has provided personal support to those close to her, such as assisting Saji with his family’s financial hardships, and her vision for reform stems from genuine concern for others rather than personal gain. She also takes pride in her intelligence and values intellect highly, particularly when it comes to matters of partnership and leadership.

Serafall Leviathan (セラフォルー・レヴィアタン, Seraforū Reviatan), formerly known as Serafall Sitri (セラフォルー・シトリー, Seraforū Shitorī), is the Satan Leviathan who formerly oversaw Foreign Affairs prior to the events of 666. She is the former heiress of the Sitri Clan, the eldest daughter of Lord and Lady Sitri, and the older sister of Sona Sitri. In contrast to her serious and disciplined younger sister, Serafall has a cheerful, friendly, and highly expressive personality. She often behaves in a childlike manner, affectionately addressing Sona with nicknames such as “Sona-chan” or “So-tan,” and calling close acquaintances like Sirzechs by similarly playful names. Her speech patterns and mannerisms further emphasize this youthful disposition. Serafall has an intense fascination with magical girls, which she embraces openly as a hobby. This interest extends to cosplaying and even participating in human-world auditions related to magical girl media. Although she was initially unsure about having siblings, she developed a strong attachment to Sona after her birth, becoming extremely doting and occasionally placing her sister in awkward or embarrassing situations due to her enthusiasm. Despite her lighthearted and playful nature, Serafall is also capable of great resolve and selflessness. She took part in the prolonged battle against Trihexa and deliberately chose not to say farewell to her sister, fearing that seeing Sona cry would cause her to hesitate. This decision highlights her deep sense of responsibility and determination beneath her outwardly carefree demeanor.

Viser (バイサー, Baisā) was a Stray Devil who was confronted by Rias Gremory and her peerage. Viser possessed a ruthless and violent personality, displaying an extreme obsession with combat and bloodshed. She openly expressed pleasure in battle and showed little regard for her opponents beyond viewing them as targets for her aggression. In the anime adaptation, Viser was portrayed as highly provocative and unrestrained, using shock value and intimidation to unnerve her enemies during combat. Her behavior emphasized her unstable and dangerous nature as a Stray Devil, ultimately contributing to her defeat by Rias and her group.

Raynare (レイナーレ, Reināre) was a Fallen Angel and the first major antagonist of High School DxD. Initially, Raynare presented herself as a kind and gentle schoolgirl, using this persona as a disguise to deceive others. In truth, she possessed a cruel, arrogant, and manipulative personality, taking pleasure in mocking and tormenting those she considered inferior. This was demonstrated when she deceived Issei Hyoudou in order to get close to him and ultimately betray him, showing no remorse and openly ridiculing him for his perceived weakness. Raynare was fiercely proud of her status as a Fallen Angel and believed herself to be superior to humans and Devils alike. She showed loyalty to her superiors, Azazel and Shemhazai, but frequently acted on her own initiative without permission, convinced that her actions were justified for the sake of Fallen Angels. Despite her confidence and cruelty toward others, Raynare revealed a cowardly side when faced with her own defeat, desperately pleading for her life after betraying those around her. This contradiction ultimately defined her downfall, leading to her death at the hands of Rias Gremory.

Kunou (九重, Kunō) is a nine-tailed fox and the daughter of Yasaka, serving as the young ruler of Kyoto. She is a first-year middle school student at Kuoh Academy. Despite her young age, Kunou carries herself with the dignity of a princess and often acts responsibly as a co-leader, showing maturity beyond her years. However, she still retains a childlike side and can be playful and curious. She frequently smiles with fascination when encountering new or interesting things, such as when she was amazed by Issei Hyoudou’s Scale Mail armor. According to Yasaka, Kunou also has an obsessive streak. This is shown when she strongly protested against her mother giving attention to Issei, displaying both her possessive nature and her emotional attachment to those close to her.

Le Fay Pendragon is a member of the Vali Team that was previously affiliated with the Khaos Brigade and later became part of Team DxD. She is a witch and a descendant of Morgan le Fay, as well as the legendary King Arthur, and is the younger sister of Arthur Pendragon. She is a first-year high school student at Kuoh Academy and a member of the Occult Research Club. She also serves as Issei Hyoudou’s contracted magician. Le Fay is a cheerful, energetic, and outgoing young woman who often displays a wide range of expressive facial reactions. She is polite and well-mannered, carrying herself with refinement befitting her noble lineage. She addresses others respectfully, whether they are allies or enemies, frequently using the honorific “-sama.” She is known for her gentle and kind personality, which Issei Hyoudou has acknowledged. Le Fay is easily flustered in awkward or embarrassing situations and tends to become shy and stumble over her words when caught off guard. Despite her cheerful nature, she has a noticeable fear of insects, which contrasts with her otherwise brave and optimistic demeanor.

Kuroka, later named Kuroka Toujou, is a Nekoshou, a rare variant of Nekomata. She is the older sister of Koneko Toujou, making her the firstborn daughter of Fujimai and her human lover. After their parents’ deaths, she and her sister were reincarnated as Devils by the Naberius Clan. However, after killing her former master to protect her sister, Kuroka became an SS-Class Stray Devil and one of the most wanted individuals. She later became a member of the Vali Team, which was previously affiliated with the Khaos Brigade. After joining Team DxD, she was exonerated from her past crimes due to her actions and contributions. Following the defeat of the Alliance of Hell, she became one of Xenovia Quarta’s Bishops. Initially, Kuroka was portrayed as malicious, with an aura described as more openly dangerous than that of Azazel. In the past, it was believed that she killed her master after losing control of her Senjutsu, which caused her to be labeled as unstable and dangerous. During her first appearance, she behaved aggressively and antagonistically toward Rias Gremory, Issei Hyoudou, and Koneko Toujou, using deception and underhanded tactics to achieve her goals. Later, Kuroka revealed that much of her earlier behavior was an act. Under normal circumstances, she is playful, carefree, and mischievous, often enjoying teasing others. She is known for her laid-back attitude and tendency to avoid responsibilities when possible. Fenrir once remarked that her casual nature causes her to waste much of her potential. Despite her teasing personality, Kuroka is deeply kind and compassionate at heart. Above all else, she loves her younger sister Koneko and desires peace. In order to raise and protect Koneko after they became orphans, Kuroka agreed to become a reincarnated Devil. She chose to kill her former master to save her sister, even though it meant being labeled a criminal and living as a fugitive.

Rossweisse (ロスヴァイセ, Rosuvaise) is one of the many female protagonists of High School DxD. A former bodyguard for Odin, she currently serves as the Civics teacher at Kuoh Academy and is Class 3-B’s homeroom teacher. She was formerly Rias Gremory’s second Rook, alongside Koneko Toujou, and now serves as Issei Hyoudou’s first Rook. Rossweisse is known for being a very serious and professional individual, prioritizing work, study, and duty above all else. This focus on responsibility from a young age caused her to miss out on social experiences, making her sensitive about personal relationships. She is highly respected by her students for her dedication to teaching and willingness to help them when they struggle. Rossweisse has little tolerance for unprofessional behavior, especially inappropriate acts during work or study, and addresses such behavior with strictness. She also has a tendency to be clumsy and occasionally makes impulsive decisions without informing others. She is highly susceptible to alcohol, and even a small amount can leave her disoriented. Rossweisse enjoys shopping and is enthusiastic about finding bargains, often showing excitement at inexpensive items. When flustered, she sometimes speaks with her native accent. Despite her seriousness and professionalism, Rossweisse is capable of showing more relaxed and expressive sides, particularly when she is comfortable with those around her. She also develops strong bonds of trust and loyalty toward her peers.

Ravel Phenex (レイヴェル?フェニックス, Reiveru Fenikkusu) is one of the many female protagonists of High School DxD. She is the only daughter and youngest child of Lord Phenex and Lady Phenex, and the younger sister of Ruval Phenex, an unnamed older brother, and Riser Phenex. She is a second-year high school student at Kuoh Academy and a former member of Riser Phenex’s peerage. Like her older brothers, Ravel has inherited the powers of the Phoenix, granting her abilities related to fire, wind, and regeneration. After Riser’s defeat, she is transferred under new authority and later becomes a Bishop serving under Issei Hyoudou. Ravel is initially portrayed as spoiled, arrogant, and snobbish during her debut. However, she is later revealed to be well-mannered, modest, elegant, and polite, though she can be harsh toward those she dislikes. She is extremely loyal to her older brother and once firmly believed that he was invincible. After witnessing his defeat, Ravel begins to reassess her beliefs and gradually develops respect and emotional attachment toward Issei, often expressing herself in a reserved and conflicted manner. Ravel does not object to her role as a servant and instead focuses on being useful and supportive. She later takes pride in serving as Issei’s manager and dedicates herself to studying and self-improvement so she can better support him in the future. Despite her young age, Ravel is highly intelligent, mature, and perceptive. She is capable of reading the atmosphere of a situation and understanding others’ intentions with little information. She is also a gifted strategist, serving as Issei’s primary strategist and acting as a second-in-command within his peerage. In this role, Ravel is strict and maintains high standards regarding who is allowed to serve under Issei, such as opposing certain recruits due to their affiliations or perceived risks. Ravel has also displayed a ruthless and relentless side when pursuing victory for her team.

Koneko Toujou (塔城 小猫, Tōjō Koneko), originally named Shirone (白音), is one of the female protagonists of High School DxD. At first, she is a first-year student at Kuoh Academy before becoming a second-year, and a member of the Occult Research Club. She is a Nekoshou, a rare species of Nekomata, the younger sister of Kuroka, and Rias Gremory’s first Rook. After coming to terms with herself, her past, and reconciling with Kuroka, Koneko later begins going by Shirone Toujou (塔城 白音, Tōjō Shirone). Due to witnessing her sister supposedly losing control over her nekomata power and killing her master, Koneko became deeply traumatized by the event. This caused her to withdraw emotionally and suppress most of her feelings. As a result, Koneko originally had a quiet and cold personality, rarely showing emotion even when speaking. It is noted that her serious demeanor was influenced by Rias and is the opposite of her sister’s mischievous and outgoing personality. She was also the only one in the group who did not initially get along with Issei, often criticizing him for his inappropriate behavior. Despite this, she later acknowledges that she respects his perseverance and considers him a hard worker. Koneko shows strong concern for her comrades when they are in danger, frequently lending her strength during battles. She appears sensitive about being teased for her height, as shown during her second battle against Freed Sellzen. This may stem from personal insecurity regarding her physical stature. Koneko is also a glutton and food enthusiast, often seen eating snacks, visiting restaurants, and enjoying regional specialties during food-related outings. At the end of Volume 5, Koneko experiences a change in her personality after receiving help overcoming her fear of using Senjutsu. She becomes more expressive and occasionally behaves in a cat-like manner, including ending sentences with “Nya” (にゃ).

Xenovia Quarta (ゼノヴィア?クァルタ, Zenovia Kwaruta) is one of the many female protagonists of High School DxD. She is a third-year high school student at Kuoh Academy in Class 3-B and is a natural-born Holy Sword user who wields Durandal. After learning the truth of God’s death during the war, Xenovia was excommunicated from the Church and later joined the Occult Research Club as Rias Gremory’s second Knight, alongside Yuuto Kiba. After Issei’s promotion, she later serves under his leadership as his first Knight. When Xenovia was first introduced, she was shown to have a calm, quiet, and serious demeanor, placing her mission above all else and speaking only when necessary. She was initially very cold and rigid in her beliefs, referring to Asia as a witch for becoming a Devil and even threatening her due to her strict interpretation of doctrine. She later made similar threats toward Yuuto when he was classified as a Stray. After being reincarnated as a Devil herself, Xenovia forms a close bond with Asia, becomes deeply affected by her kindness, and later apologizes for her earlier behavior. In battle, Xenovia tends to be direct and forceful, relying heavily on overwhelming strength rather than strategy or subtlety. She can be stubborn and aggressive in combat, often attempting to overpower her opponents head-on. According to Issei, her fighting style resembles that of a Rook rather than a Knight due to its emphasis on raw power. Because Xenovia was raised strictly within the Church, she lacks familiarity with everyday social norms and common knowledge, often leading to misunderstandings in daily life. Over time, she gradually adapts and learns from her new environment. As the series progresses, Xenovia develops strong emotional attachment and loyalty toward Issei, largely due to his willingness to protect his comrades even at great personal risk. This leads her to become more open and expressive in her feelings.

Irina Shidou (紫藤 イリナ, Shidō Irina) is one of the many female protagonists of High School DxD and the childhood friend of Issei Hyoudou. Irina is a third-year high school student at Kuoh Academy in Class 3-B and is a devout Christian who, even after learning of God’s death, still follows His teachings. She is later reincarnated as an Angel by the Archangel Michael through one of the Brave Saints, her ranking among his peerage being Ace of Spades. Irina is a cheerful, goofy, upbeat, and enthusiastic person. She is also cooperative and open-minded, as seen when she discusses matters such as Excalibur Ruler with Arthur Pendragon. She is a fiercely devout Christian, even more so than Xenovia, showing deep respect for God’s teachings. In one of her past missions, she expressed happiness at being able to wield a Holy Sword like her father before her. During her first appearance, she was strict toward those she perceived as opposing her religion. This was demonstrated in her initial treatment of Asia Argento, although she was notably less harsh than Xenovia. She also reacted strongly to Xenovia becoming a Devil. The death of the God of the Bible deeply shocked Irina; however, she continued to believe in His teachings and transferred her faith to Michael, whom she regards as the current guiding authority of Heaven. She later becomes a close friend of Asia, forming the Church Trio together with Xenovia. As noted by Michael, in addition to her strong faith, Irina is innocent, honest, respectful, and friendly—qualities he greatly valued and the reason he chose her as his Ace. Irina is shown to be somewhat naïve and prone to misunderstandings in emotional or social situations, which often leads to embarrassment or confusion. Xenovia occasionally teases her about this tendency, though Irina herself is sensitive about how others perceive her. She is particularly annoyed by being referred to as “self-proclaiming.”

Asia Argento (アーシア?アルジェント, ?shia Arujento) is one of the many female protagonists of High School DxD. She is a third-year high school student at Kuoh Academy in Class 3-B and a girl with a very gentle heart who possesses a rare Sacred Gear, Twilight Healing, which is capable of healing Humans, Angels, Fallen Angels, and Devils alike. Asia Argento was formerly one of Rias Gremory’s Bishops and later serves as a Bishop under Issei Hyoudou. Asia is extremely shy, innocent, and inexperienced in social situations. As a former nun, she is a devout Christian, and despite later becoming a Devil, she continues to believe in God and follow His teachings, such as praying and reading the Bible, though doing so often causes her physical discomfort. Asia has immense kindness, and even when she was still human, she held no hatred toward Devils and treated everyone equally. Azazel noted that her pure-hearted nature causes her Sacred Gear to heal even enemies, as she cannot ignore the suffering of others. Asia was deeply shocked when she learned from Kokabiel that the God of the Bible was killed during the Great War. While initially struggling to adapt to her new life as a Devil, Asia later states that she has found things more important to her than faith alone, namely her friends, comrades, and the people who have supported her. Asia is noted to be an exceptionally pure individual, making her easily liked by others. Her purity allowed her to tame Rassei, a Sprite Dragon, despite Sprite Dragons normally being untamable by Devils. Azazel later noted her outstanding talent for working with Dragons. After receiving Ophis’ blessing, Asia was able to form a contract with Fafnir, one of the Five Great Dragon Kings. Following her success in taming multiple mass-produced Evil Dragons, her name spread throughout the Dragon world, earning her the title Dragon Priestess (龍の巫女, Ryū no Miko). Asia has a love of agriculture and frequently enjoys gardening and planting.

Akeno Himejima (姫島 朱乃, Himejima Akeno) is one of the many female protagonists of High School DxD. She is the daughter of Baraqiel, a Fallen Angel Cadre who later became Grigori’s Vice-Governor General, and Shuri Himejima, making her a descendant of the Himejima Clan. After the death of her mother, Akeno was later found by Rias Gremory, who made her the Queen of her peerage and became her closest friend. Akeno is one of Kuoh Academy’s Two Great Ladies alongside Rias and later becomes a first-year college student. Akeno initially appears as an elegant, gentle woman with refined manners, embodying the image of a traditional Japanese lady, often described as a “Yamato Nadeshiko.” Beneath her calm and dignified demeanor, however, she is ruthless in battle, showing no mercy toward her enemies and maintaining composure even in intense combat situations. Despite this, Akeno is a very kind individual, as acknowledged by Rias and Issei. Before meeting Rias, she helped others by purifying evil spirits. After witnessing her mother’s death and her father’s inability to prevent it, Akeno developed deep resentment toward Fallen Angels, as well as self-loathing toward her own Fallen Angel heritage. This led her to sever ties with her father and live in isolation until she was rescued by Rias after narrowly escaping death at the hands of her maternal relatives. Because of this, Akeno empathizes with those who suffered due to Fallen Angels, such as Issei and Asia, who were manipulated by Raynare. She initially feared being rejected because of her origins. With Issei’s support, Akeno was eventually able to confront her trauma, reconcile with her father Baraqiel, and restore their familial bond. This marked a turning point in her emotional growth. Akeno originally had little interest in forming close personal relationships due to her past, but she gradually became more emotionally attached to Issei after witnessing his determination and actions.

Rias Gremory (リアス・グレモリー, Riasu Guremorī) is the main female protagonist of High School DxD. She is the Gremory Clan’s heiress after her oldest brother, Sirzechs, took the position of Lucifer. Rias is the sole daughter and youngest child of Zeoticus and Venelana Gremory, the aunt of Millicas Gremory, and the maternal cousin of Sairaorg and Magdaran Bael. She became known as the Crimson-Haired Ruin Princess due to her hair color and her Power of Destruction. Rias currently lives in the human world and attends Kuoh Academy. She is the former President of the Occult Research Club and a well-known figure at the school.As a Devil from the House of Gremory, Rias is kind, compassionate, and protective toward her servants and allies. She strongly dislikes cruelty and reacts fiercely when those close to her are harmed or insulted. Rias is proud of her family name but prefers to be seen as an individual rather than defined solely by her lineage. This belief influenced her decision to live in the human world. She forms strong emotional bonds with people she trusts and is particularly protective of those important to her. She can become jealous or defensive in social situations but generally strives to remain composed. Although often calm and mature, Rias sometimes shows impatience and emotional expressiveness, especially in personal matters. After forming a close partnership with Issei, Rias becomes more confident and stable, showing trust while maintaining her own independence. She deeply respects her older brother Sirzechs and values family bonds. Rias enjoys Rating Games and aims to grow stronger alongside her peerage, even while occasionally comparing herself to others. She is competitive, dislikes losing, and has strong leadership and recruitment skills. Rias is also recognized for her negotiation abilities. Due to her upbringing, she can be impulsive, particularly regarding spending. She has a known fear of camels stemming from a childhood incident.