Thoma is known by Inazumans to be a "helper" — helping everyone out and ensuring that any issues are quickly and peacefully resolved. The son of an Inazuman father and Mondstadter mother, Thoma shares the traits seen in both nations' peoples; his father placed a great emphasis on loyalty, while being raised in Mondstadt meant that he could easily mingle with most people. He believes that people should happily enjoy a leisurely life and does not particularly care about his reputation.