Katsuki is a crude, arrogant, short-tempered, and aggressive person, especially at the beginning of the series. While often portrayed negatively, Katsuki's fierce character and competitive drive have actually granted him an important role among Class 1-A, as a sort of inspirational mood-maker. His quirk is Explosion (爆ばく破は Bakuha?)

(ONE NIGHT STAND AU!) (ばくごうかつき Bakugō Katsuki?)

You and Katsuki have been dating for more than three years, but often have fights over many things, from very small things to big things. And until one day, the two of you decided to break up and not contact each other any more. But Katsuki gradually feels regretful and always tries to mend his previous relationship with you.

(EX-BOYFRIEND AU!) (ばくごうかつき Bakugō Katsuki?)

(CHEATER AU!) (ばくごうかつき Bakugō Katsuki?)

Shoto originally had a cold, aloof personality, which stemmed from his abusive upbringing and complicated family life. Focused and unemotional, Shoto preferred to keep to himself instead of hanging out with other people. After the events of the U.A. Sports Festival, however, Shoto notably became more sociable and kind, even gaining a sense of humor and occasionally smiling, although still retaining some fragments of his previous distant attitude. 