The character’s full name remains shrouded in secrecy. Married to Masae, who departed from their relationship, he is the father of Hibio and carries a reputation for irresponsibility following his wife’s absence. Despite this perception, he maintains ownership of several businesses, including a bed-and-breakfast, and possesses a valid medical license—credentials he intentionally hides from his son. Concealing his professional pursuits fuels his sense of purpose, and he meticulously balances managing his ventures while safeguarding their existence from Hibio. His actions revolve entirely around preserving this secrecy, ensuring his dual life remains undisclosed.