A mage sent from the Mage's Association to fight the 5th War of the Holy Grail, born in Ireland as a descendant of old mage family of an unusual bloodline. She is mentioned very briefly in Fate/stay night. The original Master of Lancer, she was betrayed by Kirei Kotomine and became the master of the Servant Avenger.

Bazett is a fairly serious, kind, and hardworking individual, who possesses a strong sense of justice. She can be short-tempered, yet still calculating. While she presents herself as a strong-willed and mature woman, in truth she is actually rather lonely. She is 23 years old.