Taeko Hiramatsu is Ayumu Aikawa's classmate, identifiable by her brown hair typically styled in pigtails, brown eyes, and standard school uniform. She ranks as the top honor student academically. Her personality combines kindness, friendliness, and caring nature with notable shyness, especially in social settings. A pivotal moment in her background occurred on a rainy day when she witnessed Ayumu offering his umbrella to an outdoor cat. Moved by this act, Taeko gave her own umbrella to Ayumu, sparking her admiration and eventual crush. Despite these feelings, her shyness hinders direct expression, exemplified when she failed to deliver a handmade obento intended for him. She maintains friendships with classmates Yuki Yoshida, Kanami Mihara, Tulio Orito, and Shimomura. While her affection for Ayumu remains largely unspoken, Taeko demonstrates fierce protective loyalty. This was evident when she defended him against classmates accusing him of being the "chainsaw hentai-boy" during a school graveyard incident. Her hobbies include reading and skilled participation in Hyakunin Isshu. Conversely, she possesses a strong aversion to horror themes, particularly ghosts and zombies.