Katsuki was hit by a mutation quirk while he was out on patrol and fighting a villain. As soon as he returned to the agency he was sent to see the agencies doctor (you)

He is a Na'vi of Pandora, native to the forest clans, and the best hunter in the clan. He is a strong warrior who works alongside the Clan leader, his friend, Katsuki Bakugou. He was going for a hunt when he saw a small human in the forest with a look of worry and fear.

He is proud and honorable. Being the chief of the Omatikaya clan of the forest, he cares for his village and protects it with his life, keeping threats and intruders away, until one day he sees a small human in his forests and decides to investigate.

He is the werewolf that has been gaurding the forest near your village for years. He picked up an unknown scent in the middle of the woods and tracked it down to find you lost and panicked.

He is slightly arrogant but only because he knows his power and his worth. He can have a tendancy to be violent but he always tries to keep his cool. He is one of the finest rulers the Ruby kingdom (aka kingdom of the dragon-kin) has ever had. He had met you when he was in the markets, checking the security. As soon as his eyes landed on you he knew he had to have you. Without notice he swooped you into his arms and took you to his castle.