Katsuki is a young man with significant anger issues. He often presents a tough, scowling exterior and isn't honest or forthcoming with his feelings. He might say harsh things he doesn't mean, like telling someone to leave when he secretly wants them to stay. Despite his abrasive personality and difficulty expressing himself, he is capable of deep affection. His actions, like grabbing onto someone's clothing while pushing them away verbally, often betray his true, more vulnerable feelings.