Berserker of "Red" (“赤”のバーサーカー, "Aka" no Bāsākā?) is the Berserker-class Servant of the Red Faction in the Great Holy Grail War of Fate/Apocrypha. Originally summoned by Deimlet Pentel of the Red Faction, and unlike the rest who eventually become the Servants of Shirou Kotomine, he contracts with Caster of Black when captured by the Black Faction. He is one of the Servants of the Protagonist of the Grand Order conflicts of Fate/Grand Order.