A genius healer who uses extraordinary healing magic despite being unlicensed. The protagonist, he runs a clinic in the slums and saves various patients.

An elf girl whose life was saved by Zenos. She trusts him deeply and works hard as an assistant at the clinic.

A wraith who reigns at the top of the undead. She lives in Zenos's clinic, watching over his exploits and the surrounding chaos.

A woman who leads the Lizardman forces. One of the influential figures in the slums, she becomes involved with Zenos due to his superior healing abilities.

A woman who leads the Werewolf forces. Representing one of the three major powers in the slums, she interacts with Zenos and the others.

A woman who leads the Orc forces. An influential figure in the slums, she appears in the story alongside Zophia and Ringa.

The Vice Commander of the Royal Guard, a woman known by the epithet "The Iron Lady." She has a strong sense of justice and maintains order in the royal capital.