Katsuki Bakugo (Japanese: 爆豪 勝己, Hepburn: Bakugō Katsuki), also known by his nickname Kacchan (かっちゃん, Katchan) and his hero name Dynamight (ダイナマイト, Dainamaito), is a superhero and one of the main protagonists of the manga series My Hero Academia, created by Kōhei Horikoshi. As a child, Katsuki often bullied the quirkless Izuku Midoriya. However, after they both entered UA High School and Katsuki lost to Izuku in training, he began to see him differently. After Katsuki is kidnapped by the league of villians, All Might loses his quirk in the process of saving him, which made him blame himself for All Might’s retirement, though All Might later reassures him it was not his fault. Katsuki later becomes one of the only people who know the true nature of Izuku’s quirk One for All. Katsuki’s quirk is Explosion (爆破), which allows him to make explosions from his hands by detonating the nitroglycerin-like substance he sweats; throughout the series, he learns various different ways to apply this. Overuse of the quirk causes his forearms to ache.