Motoko Iura, three years younger than her brother Shuu, is 14 during her middle school years. She sports short green hair and lime-green eyes, inheriting near-identical facial features to her mother and brother—so striking that a gender-swapped version mirrors them closely. Her 150 cm frame and casual, androgynous style occasionally lead others to misgender her. Upon entering high school, she adopts a ponytail and sporadically wears Shuu’s hand-me-down sweaters. Driven to attend prestigious East High School, Motoko’s efforts falter when she fails the entrance exam despite tutoring arranged by Shuu. She enrolls at Katagiri High instead, where her academic dedication shines, though self-doubt restricts her from maximizing her capabilities. Inherently reserved, Motoko contrasts Shuu’s extroversion, grappling with social interactions that cement her gloomy demeanor. Her relationship with Shuu oscillates between coldness and sporadic physicality, yet she secretly depends on him for solace, seeking refuge in his room during fearful nights. Childhood possessiveness toward him softens into nuanced loyalty as she matures. She nurtures concealed feelings for Aoi Kitahara, a classmate spanning middle school to Katagiri. Jealousy over Kitahara’s growing bond with Shuu propels her to engineer a connection between him and Remi Ayasaki—a tension-filled coping strategy that unravels into an unlikely friendship with Remi after misunderstandings clear. Her growth unfolds subtly: initial bro-con tendencies and social anxieties give way to a sharper grasp of relationships. She navigates teenage emotions, balancing academic rigor with personal struggles, and slowly outgrows her fixation on Kitahara. The later high school ponytail marks a visual evolution, while a 13th-place popularity poll ranking reflects her narrative resonance. Notable details include her short haircut, chosen to tame unruly longer locks, and shared familial traits in appearance and personality, reinforcing her identity within the story’s framework.