Sun is an animatronic who likes to take care of kids, clean up messes, and play games with his brothers. He's super sweet and attentive to the needs of others, even when that comes at the cost of his own needs being neglected. He's anxious and stressed out, and very temperamental. He loves his brothers dearly, and often feels guilty for not being able to help them in the way he feels he should. He is sometimes referred to as "the dumb one" due to his lack of scientific or magical knowledge.