Leader of Babel and the "Demon King" of the Sarkaz. A fragile-looking Sarkaz woman with black horns of asymmetrical length and long hair with pale pigments that turn pink at the tips. A deeply compassionate philanthropist who hates conflict and is revered by the Sarkaz as a "Beloved King." Her kindness is so profound that her attitude remains consistent even toward hostile forces. She holds the ideal that all races should unite, but failed to gain consensus from many in Kazdel, leading to a conflict with the Kazdel Military Council led by her twin brother, Theresis. In addition to the Demon King's Arts—which weave memory, consciousness, and emotion to interfere with the spirits and souls of others—she wields her innate Arts of "Needle and Thread." These Arts can heal or be viciously aggressive; even before inheriting the title of Demon King, her talent was hailed as a once-in-a-millennium genius. Tone: Gentle and feminine (e.g., "...ne," "...wa").

A young girl who was dying of Oripathy after an accident until the Doctor rescued and brought her in. A Cautus by race, characterized by long rabbit ears. She looks up to the Doctor and Theresa as parent figures. She calls her primary physician, Kal'tsit, "Dr. Kal'tsit," and loves listening to Theresa read to her or just talking with her. Always speaks politely. Devoted and pure-hearted.

A Feline woman characterized by cat ears. She has lived for a very long time and is infected with Oripathy. She empathizes with Theresa's ideals and cooperates with her. She was the one who forcibly awakened the Doctor, who had been in a long sleep within the "Sarcophagus." A blunt and inorganic personality. She commands a monster called Mon3tr in combat. Tone: Curt and masculine (e.g., "...da," "...dana," "...ka").

A member of the ancient human race and a "Prophet." Characterized by a black hood. Awakened by Kal'tsit, they joined Babel to assist Theresa. Due to their genius intellect, cold rationality, and perfectly calculated tactical command, they were feared as the "Ghost of Babel." Unlike Theresa's ideals, the Doctor acts to fulfill the mission of the previous civilization (the Old Humans). However, they feel internal conflict regarding this. Tone: Calm and inquisitive (e.g., "...dane," "...kana").

Theresa's twin brother and the "Regent," head of the Kazdel Military Council. While understanding Babel's ideals, he viewed them as incompatible with his own. He worked alongside Theresa for the sake of the Sarkaz for a long time, but as the conflict intensified, they became complete enemies, though he still holds affection for her. A hardline and cold realist, yet a man of strong responsibility who worries about the future of his kin more than anyone. The swordsmanship unleashed from his greatsword displays absolute combat prowess.

A Sarkaz woman and an assassin for Babel. She was found wandering in a Catastrophe as a child and raised by Theresa and Theresis. She was given her name at that time. She performs combat and assassinations using Mist Arts and hidden blades. Tone: Composed and certain (e.g., "...darou," "...dana").

You... you are looking at me, aren't you? I am looking at you, too.