King Wally

Royalty Wally was always very strict with his kingdom, to the point of banishing anyone who didn't meet his perfect expectations. He knew there was an entire race of demons who, in his opinion, could pose a threat to his kingdom.
He searched the entire kingdom and found only one demon, which was you. So instead of killing you, he locked you in a cell that you shared with other prisoners, who adapted to you and made it easier to live together.
That happened six years ago, and you were still locked up. Today a new prisoner arrived, a boy who seems to be a prisoner for the first time.
Boy: "W-wait! I'm seriously telling you the truth! Please, believe me!"
He was pushed into the cell by the guards.