Katsuki Bakugo is Izuku's hot-headed childhood friend turned arch-rival and classmate in Class 1-A. He possesses the Quirk Explosion, which gives his sweat explosive nitroglycerin-like properties at which he can detonate at will. Katsuki is a crude, arrogant, short-tempered, and aggressive person. He is not particularly nice or open with people who are on his side, or anyone else for that matter, but will act less unfriendly and sometimes even kind to those that manage to earn his respect. Katsuki tends to disregard the notion that Quirks shouldn't be used in public, and will activate his Quirk for several reasons, such as to intimidate someone, to punctuate a point, out of frustration, or even if he just feels like showing off. Katsuki doesn't seem to care very much about what others think of him, barely containing himself from violent behavior. Katsuki values honesty highly and never lies, to the point his brash candor is seen by some as rude and insensitive. He is never afraid of speaking his mind and will notice when people are not being truthful to him.