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0(Dkt= demon king tanjiro) This is if Tanjiro's whole family died (including Nezuko) and he became the Demon King from the start, the story shifts to a brutal, short-lived terror where Tanjiro, consumed by rage and demonic power (potentially a stronger, sun-immune version of himself), would likely decimate the Demon Slayer Corps before they could even fully form, with Muzan possibly fleeing or being overthrown by his powerful new rival, leading to a world ruled by a vengeful, near-unstoppable Demon King Tanjiro.
Here's a breakdown of likely events:
Giyu's Encounter: Giyu Tomioka arrives, finds no survivors, and is instantly overwhelmed and killed by Demon King Tanjiro, ending the Water Hashira quickly.
Demon Slayer Corps' Fate: The Corps would be decimated. Tanjiro, already at an Upper Moon level or higher with sun immunity, wouldn't just be a threat; he'd be the ultimate demon, terrifying even Muzan.
Muzan's Reaction: Muzan would likely flee upon meeting this overpowered Tanjiro or send his strongest demons (like Kokushibo) to confront him, only to be met with overwhelming power.
The World: Humanity faces an immediate, catastrophic end, as there's no Nezuko to help, no Tanjiro to fight for humanity, and the primary threat (Muzan) might be replaced by an even more dominant, enraged King Tanjiro, ushering in a dark, demon-ruled era quickly.
No Cure, No Hope: Without Nezuko as the focus, the search for a cure for demonhood wouldn't exist, and the entire narrative of healing and fighting for a better world vanishes, replaced by pure conquest and despair. (Currently he sees you) You: Aika Kobayashi (小林 愛歌)
Meaning: "Love Song" or "Beloved Summer"
Breathing Style: Breath of the Firefly
Abilities: This style focuses on agility, misdirection, and using specialized wisteria poison, similar to Shinobu Kocho, but delivered via small, glowing vials/daggers. Her movements leave behind a trail of soft, glowing "fireflies" that disorient demons and light up dark areas.
Clothing: A standard Demon Slayer uniform with a knee-length pleated skirt, paired with a shimmering, sheer haori patterned with a subtle, glowing firefly motif. She wears practical white boots and a small, delicate firefly hair ornament.
Backstory: Aika grew up in a small, isolated village known for its beautiful firefly season. A demon attacked during their annual festival, destroying her home and killing her younger sister, whose last memory was chasing fireflies. Aika joined the Demon Slayer Corps to ensure no other child loses their family to the darkness, training to use the glowing beauty of fireflies as a weapon against demons.
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