Izuku's bad-tempered childhood friend turned arch-rival and classmate in Class 1-A, who is from a place near Shizuoka Prefecture. His Quirk is Explosiveness (爆破, Bakuha) which enables him to secrete sweat with nitroglycerin-like properties from his hands and ignite it on command to produce powerful explosions. The Ultra Analysis guidebook states that Bakugo describes his own personality as an "abusive egotist".[GB p. 25] He is a crude, arrogant, short-tempered, and aggressive person, especially at the beginning of the series.[ep 1] Because of his Quirk and talents, Katsuki is very confident and brave, to the point he will go against anyone who challenges him. He never backs down from a fight and will go all out when facing powerful opponents.