

Harutora Tsuchimikado ( ) The main protagonist and the son of the branch family of Tsuchimikado clan. Despite being born into a distinguished Onmyouji family, he has no magical powers. He had been living a normal and laid back life seeing that he could not accomplish anything without any magical powers. When he was young, he made a promise with Natsume to become her shikigami and protect her. After witnessing the death of Hokuto, he became Natsume's shikigami to keep his promise he made to her many years ago. He seems to have some sort of 'Bad luck' which he considers an ancient curse passed down by his ancestors. Natsume Tsuchimikado ( ) Harutora's childhood friend and the daughter of the main family of Tsuchimikado clan. She is a prodigal onmyouji attending school in Tokyo. During summer break, she comes to Harutora's town to interrupt his peaceful life by holding him to the promise he made long ago to become her familiar. She is heir to the Tsuchimikado family and is assumed to be the reincarnation of Yakou Tsuchimikado. As a family tradition, she has to present herself as male in front of other Onmyouji families. She has a Gohou-Type shikigami called Hokuto, a true dragon spirit that has served the main family of Tsuchimikados for generations. She deeply cares about her family reputation and holds the burden of being the next heir of the Tsuchimikado clan.

Hokuto () Harutora's childhood friend. She was close to Harutora and got really jealous when Harutora was kissed by Suzuka. During his next encounter with Suzuka, she sacrifices herself to save Harutora from Suzuka's shikigami Tsuchigumo, revealing herself to be a shikigami. Hokuto's 'death' was what prompted Harutora to become Natsume's shikigami. She shares her name with another shikigami called Hokuto, a dragon. Touji Ato ( ) A former delinquent and Harutora's best friend from school. He is capable of special spirit sensing and has a vast knowledge on Onmyoudou. He was a victim to the Spiritual Disaster from two years ago. Harutora's doctor father treated him although the after-effects remained. He realized way before Harutora that Natsume was the one who conjured Hokuto. He enrolled the Onmyou Academy in Tokyo along with Harutora. He usually helps Harutora whenever he gets in trouble. He is always seen wearing a green bandanna.

Suzuka Dairenji ( ) The youngest of the Twelve Divine Generals nicknamed "the Prodigy". She is a wanted criminal for researching and using forbidden magic. She comes to town searching for Natsume to make her as an offering in a Taizan Fukun Ritual to revive her brother. She researched on Yakou Tsuchimikado and his Taizan Fukun Ritual in order to bring her brother back to life. This leads her into conflict with the Onmyou Agency. Kon () Harutora's shikigami. A diminutive silver-fox spirit who wears miko-like clothing and wields a wakazashi. She has been by Harutora's side since the moment he became Natsume's shikigami, but due to his low spiritual power and awareness, he was unable to hear or see her. A rare Gohou-type shikigami, she possesses independent thought and actions and is fiercely loyal to her master, and even gets jealous when Harutora associates with other girls. She has served the Tsuchimikado clan since a long time.

Kyouko Kurahashi ( ) The Granddaughter of the director of the Onmyo Prep School and heir to the Kurahashi family. She is part of the top students in the school and one of only 3 known students to possess a Gohou-Type shikigami which consists of two Yaksha demon class warriors called Hakuou & Kokfuu. Initially she appears antagonistic towards Harutora (and by extension Natsume) due suspicion of using his family's fame and status of being Natsume's shikigami to suddenly enroll directly into the elite academy at mid semester. Tenma Momoe ( ) A classmate that befriend Harutora and Touji during their first day at academy. He ended up unwitting involved in the Yakou Disciple incident when he was caught in attack from a shikigami called a Kodoku meant for Harutora. He however resolved himself to help Harutora rescue Natsume after listening his request. Since then, Tenma has been drawn in various events related to the cult despite his somewhat cowardly nature. He is quite knowledgeable on various info relating to current events of the Onmyodo world at large and sometimes helps Harutora catch up with his studies by lending him his notebook.

