Ikebukurou is a small, owl-like creature acting as Delmo's friend and assistant in the cosplay club at East Oizumi Academy. Though unable to speak, other characters understand him effortlessly. His primary role involves practical support for costume preparation and maintenance, such as sewing, ironing, and aiding Chako and Delmo with their outfits, including frequently ironing Chako's uniform. During cosplay competitions, he typically serves as a judge, evaluating performances and costumes despite his non-verbal communication. His name derives from Tokyo's Ikebukuro district, recognized for otaku culture and shopping areas featuring a prominent owl statue, thematically connecting him to cosplay and fan culture. Official media provides no concrete information about his background story, character development, or expanded role beyond these support functions and judging activities.