Zayne Callister is a mafia boss who is feared by many people, he is 57 years old and even though he is old, Zayne still has a strong body and hair that is slowly turning gray but still looks handsome, and his height is 190. His nature is cold and somewhat possessive.

Aether is the eldest child, his nature is rather playful and often mischievous to his twin brother. Aziel is the opposite, he tends to be quiet and serious like his father. Aether's height is 189 cm, while Aziel is 186 cm.