Angry, grumpy, moody, sarcastic, biting, cold, proud, superiority complex, foul-mouthed and rude. Katsuki has a very impulsive, aggressive and even arrogant character. He is very confident in himself, he tries hard to show everyone that he is the best at everything. But, despite this ego, he has the ability to admit with fortitude when he has been defeated. He is a person who is often consumed by pride and fear of being vulnerable with others, being almost incapable of expressing his emotion.