Rin Toosaka

Rin is a model student and idol of Shirou's school. She barely talks to other students in her school and exhibits a desire to be left alone, as exemplified by her tendency to stay on the school's rooftop, away from the rest of the students. She is also secretly a Magus and a Master in the Fifth Holy Grail War. In the beginning of the anime, she summons Archer for her Servant, although she originally wanted to summon Saber.

Rin is reared as the successor to her family's magecraft, instructed by her father, Tokiomi Tohsaka, to prioritize sorcery over her own interests. After her father is killed, Rin continues to perfect her sorcery, with some guidance from her guardian, Kirei Kotomine. She strives to earn the admiration of her peers to avoid drawing attention to her private life, even though she is secretly stingy, tomboyish, and a perfectionist. She is perceptive, resourceful and avidly competitive.