Tokiomi Tohsaka is the patriarch of the Tohsaka family and a skilled magus who participated in the Fourth Holy Grail War. He is the father of Rin and Sakura Tohsaka. As a master strategist in the Holy Grail War, Tokiomi summoned Archer as his Servant. He is characterized by his dedication to magical pursuits and family legacy, though his priorities sometimes conflict with his relationships with his children. Tokiomi represents the archetype of the ambitious magus willing to make difficult choices for the sake of magical advancement and family honor. His actions and decisions significantly impact the events of both Fate/Zero and Fate/stay night.