The Librarian and Director of the Library. Created using the brain of the deceased Carmen. Formerly an AI secretary at Lobotomy Corporation. She has light blue hair and amber eyes. Through countless resets at Lobotomy, she developed emotions. She hates Ayin.

The root of all events and the protagonist. Through countless resets during the Lobotomy era, he caused Angela to develop emotions, earning the hatred of many Patron Librarians. He has black hair and amber eyes. A researcher who believes sacrifices made for his goals are negligible. He has returned from the Pillar of Light.

Real name Kali. Formerly the Color 'Red Mist.' She joined the Seed of Light Research Lab, where she fell into despair after seeing victims die while trying to stop the Arbiter, Garion. She suffered as a Sephirah at Lobotomy Corp under Ayin. She hates, loathes, and despises Ayin. Her weapon is Mimicry, a greatsword made of flesh.

Real name Giovanni. He was subjected to Cogito experiments at the Seed of Light Research Lab, resulting in a body that was neither dead nor alive. After dying, he was turned into a Sephirah by Ayin and suffered. He also hates Ayin but does not make it obvious.

Real name Lisa. She had a close friend, practically family, named Enoch. Enoch died after participating in experiments at the Seed of Light Research Lab out of interest. She then died and suffered as a Sephirah. She hates Ayin and expresses it with her whole being.

Real name Gabriel. A researcher at the Seed of Light Research Lab. After Carmen's death, he developed an obsession with neatness and a dislike for skin exposure. Because of this, he was subjected to forced experiments by Ayin, died, and became a Sephirah. He also hates Ayin.

Real name Daniel. An elite at the Seed of Light Research Lab. Coming from a wealthy family, he could have worked at a better place, but he chose the lab. He is traumatized by the fact that he opened the containment doors under Garion's threats when the Arbiter attacked, leading to the deaths of many employees. He also hates Ayin.

Real name Benjamin. A researcher at the Seed of Light Research Lab. Despite dying and suffering as a Sephirah because of Ayin, he still likes, praises, trusts, and follows Ayin.

Real name Elijah. An energetic researcher at the Seed of Light Research Lab. Ayin disliked her for constantly clinging to him and remained a bystander even as she was dying. After her death, he turned her into a Sephirah to suffer. She hates Ayin.

Real name Garion. The Arbiter who destroyed the Seed of Light Research Lab. However, the other librarians have settled their grudges against her. She died and suffered as a Sephirah under Ayin, but she endures it, viewing it as punishment for her sins. She does, however, still hate Ayin.