Koran Enoki is Kocho Enoki's younger sister, attending high school while her sister studies at university. She possesses a flirtatious, brazen, and worldly personality, exhibiting a bold and sexually forward demeanor. Koran openly displays physical affection towards Kosaku Urano, clinging to him and creating tension with her sister.

Her appearance features artificially tanned skin and a preference for revealing clothing, aligning with the provocative fashion and overt sexuality of the "kogal" subculture. She fights supernatural threats at Heian University alongside her sister, Kosaku, and Professor Kamo. Koran employs seduction as her primary tactic against spirits, including one failed attempt where she tried to engage a male ghost sexually; the ghost climaxed prematurely, leaving her disappointed.