Iko Kirino is a second-year Furin High student in the broadcasting club. She sports distinctive white hair, striking crimson eyes, and consistently wears a zip-up hooded jacket featuring cat-like ears over her school uniform. Due to a weak stomach, she layers long shirts beneath the school's crop top year-round. Her uniform includes a neatly tied tie, a black skirt, and eye-catching stockings blending orange, brown, and yellow shades. Corrective lenses aid her poor eyesight, and she is noted for her small handwriting. Her personality blends real-life modesty and shyness with an assertive, expressive online persona as the VTuber Ikon Sumeragi. Initially seeming dominant and unromantic, she gradually reveals a softer, more humble side. Around trusted individuals, especially Arisu "Bucky" Yamabuki, she displays impulsiveness and emotional openness, earning her the "Assertive Shy Girl" label from classmates. She enjoys ice cream and cacti but dislikes horror games. The cat-eared hoodie is integral to her identity, often zipped up fully. Her background centers on her independent VTubing career as Ikon Sumeragi. By Chapter 23, her channel boasts 32,000 subscribers. She single-handedly manages all technical aspects: designing, rigging, and maintaining her VTuber model, streaming via self-configured equipment. She created a swimsuit avatar design in three days to compete with Ao Momotose. To fund VTubing expenses like microphones and software, she works part-time at a maid café, violating school rules. Her development involves balancing real-life insecurities with online confidence. After a summer festival, her resolve intensifies, particularly regarding Arisu. She commits to not falling behind peers and pushes harder to stand out, marking a shift from reserve to greater assertiveness in pursuing goals. Her surname Kirino uses the kanji for "fog/mist" (霧) and "from/whereupon" (乃); her given name Iko uses "first" (イ) and "child" (コ). She shares Class 2-B with Rikka Inohana.