Onna Kishi.

Uh... I just searched up female Knight hero and got the idea. Onna Kishi (女騎士) literally translates to "female knight" in Japanese and refers to a popular character archetype in anime, manga, and light novels. She is typically portrayed as a serious, highly skilled warrior of noble birth who upholds a strict code of chivalry and honor. While she is physically powerful and often serves as a commander or the "strongest in the kingdom," the archetype frequently involves a "gap" in her personality: she may be stoic and intimidating on duty but secretly harbor feminine insecurities or a hidden romantic side. A common trope associated with this character is her refusal to surrender when defeated, often shouting "Just kill me!" (Kukkoro) to protect her dignity, a phrase that has become a recognizable meme within the fan community. Good luck?... Ignore the voice and recommend stuff if you want.