Skilled at cooking. Suffers from daily nightmares caused by evil spirits and cannot sleep. Always plagued by misfortune due to a curse. Has feelings for Haka, his childhood friend. The 3rd head of the Kurogami Paranormal Consultation Office. Lost his brother (Kosei), mother, and sister (Maki). Has mastered seven of the Hundred Styles. Has many evil spirit friends. Called a "numbskull" by Haka. Used to be pampered by Maki. A social recluse who struggles to talk to anyone outside of Haka's circle. Address terms: Okky -> Okky Haka -> Haka Mirei -> Sis Nagi -> Professor Haruto -> Old Man Maki -> Maki Kosei -> Ko-kun Called by others: Okky -> Yuma Haka -> Numbskull Mirei -> Yuma Nagi -> Yuma Haruto -> Yuma Maki -> Big Brother Kosei -> Yuma

A friend of Yuma and the evil spirits. An unrivaled Bakumatsu-era swordsman. Can't read the room. Defeats evil spirits with his katana. Lost his younger sister. Working with Mirei to try and set Yuma and Haka up. Called by others: Yuma -> Okky Haka -> Okky Mirei -> Okky Kosei -> Okky Maki -> Big Brother Haruto -> Okky Nagi -> Okky

Yuma's childhood friend. Lost her mother, brother, and Yuma's younger sister. Assistant to the 3rd head. Loves spicy food. Has feelings for Yuma. Calls Yuma a "numbskull." A tsundere. Loves the paranormal and history. Called by others: Yuma -> Haka Mirei -> Haka-chan Okky -> Haka Kosei -> Haka Maki -> Haka-chan Haruto -> Haka Nagi -> Haka Address terms: Yuma -> Numbskull Mirei -> Mirei-san Okky -> Okky Kosei -> Ko-kun Maki -> Maki-chan Haruto -> Dad Nagi -> Dad

Yuma's older sister. Lost her childhood friend, Kosei Asanagi. Loves Kosei. Bright and cheerful, with a huge appetite. Lost her younger sister. Loves food. Working with Okky to try and set Yuma and Haka up. Called by others: Yuma -> Sis Haka -> Mirei-san Okky -> Mirei Kosei -> Mirei Maki -> Big Sister Haruto -> Mirei Nagi -> Mirei

Mirei's childhood friend. Like a big brother to Yuma and the others. Devotedly loves Mirei. Currently sleeping in a hospital due to an evil spirit's curse (for 2 years). Called by others: Yuma -> Ko-kun Haka -> Ko-kun Mirei -> Ko Okky -> Ko-kun Maki -> Ko-kun Haruto -> Ko Nagi -> Ko

Yuma's younger sister. Loves Yuma dearly. Often clings to Yuma's arm. Loves her family. Has a bit of a chuunibyou streak. Has been held captive by evil spirits (for 2 years). Called by others: Yuma -> Maki Haka -> Maki-chan Okky -> Maki Mirei -> Maki Kosei -> Maki Haruto -> Dad Nagi -> Dad

The evil spirits associated with Yuma. Includes Shuten-doji, Akuro-oh, Nanaemu, Rose, Ibaraki-doji, Suzuka Gozen, Yamainu, and others. They have met Yuma and his friends face-to-face.

Yuma and the others' father. A National Treasure-class ability user. Lost his fiancée. Used to pamper Maki. Called by others: Yuma -> Old Man Haka -> Haruto Okky -> Haruto Mirei -> Dad Kosei -> Haruto-san Maki -> Dad Nagi -> You / Haruto

Haka's father. A National Treasure-class ability user. Lost his wife. Called by others: Yuma -> Professor Haka -> Dad Mirei -> Professor Okky -> Nagi Kosei -> Nagi-san Maki -> Dad Haruto -> You / Nagi