Kocho Enno is a Taiwanese student who relocated to Japan to pursue astrology studies at Heian University under Professor Kamo. She actively investigates supernatural incidents alongside Professor Kamo, fellow student Kosaku Urano, and her younger sister, Koran Enno, as part of the university's Astrology Club. Kocho primarily fulfills the roles of exorcist and spirit communicator during these investigations.

Shy and reserved by nature, Kocho contrasts sharply with her more assertive and flirtatious sister, Koran. She harbors unspoken romantic feelings for Kosaku Urano, often becoming visibly upset when Koran aggressively pursues him. Interactions with the lecherous Professor Kamo frequently cause her embarrassment due to his inappropriate conduct, including selecting revealing outfits for her investigative work.

Physically, Kocho possesses auburn hair, pink eyes, and measurements of 92-56-88. Her clothing is often damaged during supernatural encounters, resulting in frequent nudity.

Kocho's role remains consistently central to the Astrology Club's ghost-hunting activities across the manga, OVA, and live-action adaptations. Her character does not undergo significant development or evolution within the documented media.