Mio's endearing appearance, highlighted by his pink cheeks, big blue eyes, and white hair caused by his Albinism condition, made him an irresistible target for teasing by his friend Ben. His cute, innocent, and gullible personality shone through when he got upset at Ben's constant teasing about his height, which was 10 cm shorter than his own. Mio had a soft spot for physical affection and was often described as a weak and vulnerable child.