Toshio Mogami belongs to the Mogami family and is father to Shunta, Kento, and Usagi. He possesses reddish-brown hair, blue eyes, and wears black-frame glasses. His typical outfit is a green diamond-patterned sweatshirt worn with blue pants.

Toshio shares a strong passion for the Battle Spirits card game with his sons, Shunta and Kento. He frequently engages in animated discussions with them about card strategies and game mechanics, often within family settings. These passionate conversations sometimes create lighthearted friction with his daughter Usagi, who displays less interest in the topic.

His role centers on being a supportive parent. He regularly attends the Battle Spirits championships as a spectator, watching his son Shunta compete, often accompanied by Kento.