14 years old, in 2nd year of middle school, and works part-time as a shrine maiden for Tenman Shrine. With her mother missing, she was under the care of her paternal grandparents for the longest time, but now she lives together with her father Shingo. A reliable girl for her age, being able to do all household chores in place of her mother. Dreams of a "normal" life where she is living with both parents, but she had inherited an element of a divine priestess (for possession) from her mother, causing her to be able to use Tensou (Wielding and Creating), she ends up running about working as an exorcist.

A candidate to become the next shrine maiden for the well-known Tenman Shrine. Simple and innocent, an energetic girl that acts on inspiration as soon as she thinks of it. Looks up to the "Exorcist Priestess" that has been passed down in Tenman Shrine from generation to generation, and does not stop believing that she can become one as well. The one that led Matoi to use Tensou as a result of bringing out a sacred treasure purely out of curiosity.

A member of "Fatima", a secret special organization directly under the rule of the Vatican. 15 years old. Fatima is an organization that specializes in exorcism regardless of legality, and she is one of the "anti-creed" that actually performs the exorcism under the guidance of the priest. She meets Matoi and Yuma when she is sent to Japan on a mission.

Matoi's father, and a detective working in the Kanagawa Prefectural Police Detective Division for the Metropolitan Police Department. With his wife Shiori missing, his parents decided he could not take care of both work and family simultaneously, and took care of Matoi. Starts living with his daughter again now that she is in 2nd year of middle school, but with the long years of alienation, his daughter calls him "Shingo-kun".

An agent for "IATO", the International Anti-crime Treaty Organization. Acts together with Shingo's group that had been chasing after the truth behind the supernatural case involving evil spirits (knights), and comes across an exorcism girl (Matoi) and an evil spirit during the investigation, causing her to stay on site for a while. A "cool beauty" of sorts, but is rather good at taking care of others.

A priest who is a part of "Fatima", the Vatican's special organization. Acts as supervisor for Clarus Tonitrus, the "anti-creed" that performs the exorcism. Arrives in Japan with Clarus following an evil spirit (knights)....

An officer working under Shingo in the Kanagawa Prefectural Police Detective Division for the Metropolitan Police Department. A serious man who is true to and dedicated to his job, but sometimes acts foolishly. Given the reason "he's a frail little dog", Shingo called him Pochi. Has a weakness for sexy women like Luciela.