TV-Series
Description
Nagamimi is one of the three spiritual beings called the Ongyou, working with Mataichi and Ogin to identify and punish sinners emitting a dark aura, chiefly murderers. His primary talents are shapeshifting and the power to communicate with and command animals, skills he frequently employs to control birds and other creatures during the Ongyou's missions. Explicitly over 200 years old, he stands as the oldest member of the trio by a significant margin. His long existence includes knowledge of traditional Japanese performing arts, specifically Kabuki.

Physically, Nagamimi possesses a distinctive, imposing appearance marked by a large upper body, long legs, and a notably wide mouth. His design emphasizes grotesque, exaggerated features that enhance his otherworldly presence. He often uses his shapeshifting for disguise, such as impersonating an innkeeper during an early mission, though this ability sees inconsistent use in later encounters.

Within the group, Nagamimi frequently acts as a deterrent to the human observer Momosuke, repeatedly warning him against interfering and urging him to leave before becoming irreversibly entangled in their grim work. He commonly refers to Mataichi as "trickster," signaling their long-standing familiarity. Unlike Ogin, whose tragic human past is explored, Nagamimi's origins and history prior to joining the Ongyou stay largely unexplained. His role remains focused on facilitating target punishment through his supernatural abilities.

Nagamimi participates in the group's conflict against their manipulative patron, Kyogoku Tei. During the final confrontation, he sacrifices himself alongside Mataichi and Ogin to defeat Kyogoku Tei, resulting in his apparent death and leaving Momosuke alone. Notably, moments before her own sacrifice, Ogin addresses Momosuke by his actual name for the first time, departing from her usual term "Author." The narrative leaves open the possibility of Nagamimi and the other Ongyou members' continued existence in some form after Momosuke completes and publishes his anthology of one hundred ghost stories.