My Hero Academia
Katsuki is one of Izuku's childhood friends and classmates in Class 1-A, whom Izuku calls "Kacchan." He has the Quirk "Explosion", which allows his palm sweat to become nitroglycerin and explode. He has made fun of Izuku for not having a Quirk since childhood, even though they were close friends, and also the one who gave him his nickname as an insult. After growing up spoiled by people around him for his Quirk that he became more egotistical and thought that others, mainly Izuku, are below him. He started to bully Izuku when he tried to help Katsuki, making him think he was looking down on him. In the beginning of the series, he thinks that he is the strongest hero, and dreams of becoming richer and more famous than All Might. He stops picking on Izuku after his attempt to save him from a villain, and he truly starts to slowly change after Izuku beats him in their battle training. He is the best. Everyone's favourite.