Ruijerd Supardia is a skilled and battle-hardened warrior from the Superd race in Mushoku Tensei: Isekai Ittara Honki Dasu. He is known for his stern appearance, green hair, and the red gem on his forehead, as well as his deep sense of honor and responsibility. In the series, he becomes a major companion and mentor figure to Rudeus and Eris, guiding them through dangerous journeys while seeking to restore the reputation of his people.