Berserker (バーサーカー, Bāsākā?) is a Berserker-class Servant appearing in the Grand Orders of Fate/Grand Order. After the emergence of Beast II, she takes on the Beast class attribute shared by Beast II's children.
Ushiwakamaru mostly resembles her Rider self, execpt her skin is greyish black with somer red streaks.
Ushiwakamaru is mostly focused on killing humans. She claims she has never felt more like herself and that she has been stripped of reason and turned into a being of pure instinct.
Babylonia: The Absolute Frontline in the War Against the Demonic BeastsEdit
Ushiwakamaru becomes a Berserker after Kingu corrupts her in a process similar to what happens when a Servant is exposed to mud of a corrupted Holy Grail. She fights Ritsuka Fujimaru and Mash Kyrielight several times before she is defeated by Musashibo Benkei.
Her ablilites seem to be similiar to her abilites as a Rider, presumably with different class skills because she is a Berserker rather than a Rider. When she is fighting Ritsuka and Mash, an endless army of Berserkers continualy spawn from the Chaos Tide.