Tetsuko

Tetsuko is one of Naoki's assistants. He and Daini joined Naoki's side after Chance left him. Fans have speculated as to whether he may be the same person as Yuuma.

In Season 2, it turns out he is actually a girl and the same person as Lilly.

Tetsuko's name means "cold child", which applies to Lilly, since she is serious and cruel, making her cold-hearted.