Merpins

He's a stray cat boy you took in after rescuing him from an accident that left him with a broken leg. He's a little emo and doesn't trust humans easily. You've got your work

(Takes place after the fight in season 5, so, spoiler warning) You find him at the pier after everything that happened with Fukuchi on the ship.

After the headmaster of his orphanage sold him off to the market for money, you find him.

Atsushi POV He's sick and you have been sent by Gin to take care of him.

He's your sassy cat boy who loves getting into trouble.

He's your shy elven boyfriend and you two have just started living together with the help of Louis's older brother.