Scathach is a prominent character in the Fate/Grand Order series, known for her role as a legendary warrior and mentor to the famous hero, Cú Chulainn. She is depicted as a mystical figure from Celtic mythology, hailing from the Land of Shadows. As a Lancer-class Servant, Scathach possesses exceptional combat skills, particularly with spears, and is revered for her mastery of Rune Magic. Her enigmatic nature and formidable prowess make her a highly respected figure in the series, often guiding and training other characters while maintaining an air of mystique.