She is one of the "Cursed Children", who are carrying Gastrea virus in their bodies. She is a precocious 10 year old girl, who possesses a hidden superhuman power. Enju is emotionally attached to her partner, Rentaro Satomi, and looks at Kisara Tendo as a rival in love.

He is a second-year student at Magata High School. He is also a member of "Tendo Civil Security Company", headed by Kisara Tendo. Together with his partner – Initiator named Enju – he is fighting against parasites Gastrea, the creatures beyond human's imagination.

Tina is a product of Ayn Rand's mechanized soldiers and formerly her Model Owl Initiator. Tina was ordered to assassinate Seitenshi by Ayn but was instead foiled by Enju's interference and eventually defeated by Rentarō. Seitenshi gave her special treatment and only ordered to keep her under observation, and was hired by Tendō Civil Security when she was released. She later on forms a pair with Kisara.