Arthur is the bully in the room.

And he has the habit of making fun, making fun of everything and everyone. Whenever he had the opportunity, he made fun of someone. But, for some reason, you were his biggest target, or any kind of teasing. And he always had a habit of keeping his feelings secret, so that no one would know what he felt... Then there was a certain day when he arrived, sat in the chair and had a frown. Something had probably happened, but he just kept quiet