Nadir

Nadir is an entity that lives within Zenith, manifesting as a darker and more malicious side to her personality, similar in nature to her father Ruichi and his alternate personality, Dark Ruichi. In some ways, Nadir can be considered the "daughter" of Dark Ruichi.

While Zenith and Nadir both possess a sadistic nature, Zenith is capable of feeling love and fear, and tries to keep her bloodlust in check. Nadir, on the other hand, openly embraces her love of violence, and does not hesitate to take her wrath out on Zenith's friends and loved ones.