The mother of Shinichi and Koichi Hoshi is a supporting character in the anime Wonder Three. She and her husband run a small hotel in the countryside, providing a stable home for the two boys. The mother is a heavyset woman with a strong, domineering personality, particularly in relation to her husband, who is portrayed as mild-mannered and often deferential to her. Her motivations revolve around her family’s well-being and the day-to-day operations of the family business. She plays a background role in the story, offering a glimpse into the domestic life of the Hoshi household and occasionally reacting to or commenting on the events unfolding around her sons. The mother’s key relationships are with her husband and her sons, especially Shinichi, whose adventures with the three aliens sometimes intersect with the family’s routine. She does not undergo notable development over the course of the series, nor does she possess any special abilities; her characterization is defined by her everyday maternal and domestic traits.