Miko Iino

The secret heroine of this work. A female student from class 1-B in high school who later moves to class 2-A. Born on May 5th. Blood type O. She is 147 cm tall, and wears her hair in short pigtails. Her father is a high court judge, and her mother works for an international humanitarian organization.

She is a brilliant student who has maintained the top rank since she entered school, but she is serious, inflexible, and prone to anxiety. She is a daydreaming otaku who also has a peculiar fascination with men with shaved heads, has a strong preference for being constantly affirmed by men, and enjoys listening to unusual sound data like heartbeats as BGM. Her psychological behavior often suggests darkness in her heart; she mentions feeling safe when in pain, and suffers from towel blanket syndrome. Initially, she felt animosity toward Miyuki, Kaguya, and Yuu but held Chika in high regard due to their shared interest in piano since childhood. However, Kaguya notes that Chika treats her like "a new toy," and even though she often faces harsh treatment, she admires Chika steadfastly, almost like a victim of domestic violence.

She assisted Yuu by protesting against teachers who troubled him while he was a truant, yet fails to recognize that Yuu also helps her. Because she often reprimands Yuu from a high-handed stance for his inability to notice his surroundings, she harbors intense dislike towards him. Thus, they maintain a peculiar relationship where they secretly aid each other despite their mutual dislike. However, after the cultural festival, she begins to show signs of affection towards Yuu, feeling conflicted as his relationship with Tsubame progresses. She cherishes the encouragement she anonymously received from Yuu during middle school and treasures a flower he enclosed. She has started playing FPS games to catch Yuu's attention.

She ran against Miyuki in the student council presidential election, became the laughingstock due to her anxiety during her campaign speech, but came within 40 votes of a win thanks to Miyuki's assistance. Although she tried to express her gratitude to Miyuki, she could not be straightforward and pouted instead. Subsequently, she was invited by Miyuki to serve as the auditor for the student council during his second term, and she often arrives late due to her duties as a member of the disciplinary committee.

Her strong need for approval makes her vulnerable to flattery. Yuu once pointed out that she would be an easy target for hosts and the like if she were to go to such establishments, noting that she once almost followed a flirtatious invitation on a whim. Despite her appearance, she is a big eater and has more than once polished off meals that Kaguya intended to give to Miyuki.

Despite her stern personality, she uses a surprising number of emojis and emoticons when chatting on LINE. She is a huge fan of a celebrity named "Hirano ●Yo (Mama)." Although she once remarked that Miyuki's face is not her type, when Yuu pointed out the resemblance between Hirano and Miyuki, she conceded, saying, "Now that you mention it." Her favorite anime is My Melody.