The "Guarding and Guarded Giant Wheel".
Stage 3 mid-boss and boss of Touhou's Undefined Fantastic Object, and later a playable character in Hopeless Masquerade.
A youkai with the ability to use her nyūdō partner Unzan in combat. She is one of the followers of Hijiri Byakuren, whom she is trying to free. Ichirin is a Buddhist nun, wearing a black kesa, a blue hood and a red pendant. She has blue eyes and blue hair. In her hands, she holds a golden ring/hoop.
Appears to have developed a competitive rivalry and friendship with Mononobe no Futo as a result of their partnership in Antinomy of Common Flowers.