Minamoto no Raikou is a powerful female Servant in Fate/Grand Order, portrayed as a legendary warrior and motherly figure. Based on the historical and mythological Minamoto no Yorimitsu, she is a Berserker-class character in many appearances, known for overwhelming strength, protective devotion, and a deeply affectionate yet unstable personality. In the series, she serves as both an ally and a formidable combatant, often acting as a guardian who fiercely protects those she considers family, especially the protagonist.