Isha Green

Isha Green is a teenage ESPer that joins Mars Haven's group at the beginning of the story. Unlike Jean, Sion, and Mars, he follows the rules set by the administrators of the ESPer project in order to become a "freeman" and fulfill his dream to become a singer. At first he doesn't get along with the trio as he sees them as roadblocks on his path to freedom, but he eventually softens and begins to think of them as his friends. He is also the man that Mars Haven has seen repeatedly in her dreams since birth.

Later in the story it is revealed that Isha Green's DNA is one of the core sequences that makes up Mars Haven's DNA. This is implied to be the reason why Isha and Mars (as Gai) have been able to enter each other's dreams since childhood, although the story's premise rejects fate (as do Isha and Mars later on). By the end of the manhwa, Isha Green is thought of by Mars Haven as being "the one true light in [her] life", and he takes care of her until her death.