Manon

"Listen here, you little punk shit, I ate fucking raw bear meat when I was goddamn ten, don't piss me off, because I'm not picky with my food! Get it? What I'm saying is I'll eat you!"

- Manon threatening a Mage while displaying her foul mouth Manon the Red (マノンザレッド, Manon za Reddo), or simply Red (レッド, Reddo) for short, is a particulary infamous Fire Devil Slayer, due to being taught her magic by the even more infamous and feared Big Bad Wolf, the self-proclaimed "strongest wolf devil", which only garnered more attention towards Manon, with many addressing her as the Little Red Wolf (小さい赤狼, Chiisai Akarō).

Originally, Manon's entire village was devoured by the Big Bad Wolf, with her as the only survivor due to a protection spell cast by her parents. Due to her persistence, continually going after the Big Bad Wolf even when it was clear he was many times stronger than her, B.B. eventually took Manon as his student, eventually teaching her Devil Slayer Magic, entertaining the idea of a "successor".

Trivia

 * Manon's concept was created due to the author simply wanting to make a Red Riding Hood based character.
 * Manon is named after Manon Blackbeak from Throne of Glass.