This widowed father raises daughter Naho and son Jun alone after his wife died giving birth to Jun. Glasses frame his eyes, and he carries extra weight. His demanding job forces long absences from home, leaving Naho responsible for Jun's care. On Naho's birthday, he departs for work despite the occasion, arranging a babysitter who ultimately fails to arrive. This absence, placing Naho under the strain of sudden sole responsibility, indirectly sets the stage for her encounter with the dream sphere dealer Kotarou. No further details exist regarding his background, development, or storylines beyond this event.