Delphin is an androgynous looking young boy with shoulder-length turquoise hair and large turquoise eyes. He wears a yellow-green scarf around his hair, knotted at the side. He wears two necklaces with shells on them, one from his mother and the other from Poseidon.
Delphin is a serious, hardworking individual who does not tolerate slacking off, especially from his boss Poseidon. Even though he often has an exasperated appearance, he is more understanding than he seems.