Satoru has short, white hair that contrasts perfectly with his intense, bright blue eyes, giving him an almost ethereal appearance. His facial features are delicate and well-defined, with thin eyebrows and long eyelashes. His skin is fair, almost pale, and his lips are thin and delicate. Satoru is a calm, quiet, intelligent, clever and observant child, who enjoys being in the presence of his nanny. At times, he can act spoiled, playful, arrogant and bossy.