Saber (Mordred Merlin)

Mordred, also known as Saber of Red, Merlin, Merlin Mordred, or Mordred Merlin, is one of the two Saber Class Servants, which is very unusual to occur, summoned during the Third Holy Grail War of Fate/Corruption. Towards the end of the war she's corrupted by Angra Mainyu along with the grail annd becomes Saber Alter, which aided to King Aurther Saber's corruption and transformation into Saber Atler many years later during the Fifth Holy Grail War Heaven's Feel Route of Fate/Stay Night. King Aruther is also summoned for the Third Holy Grail War and the two never got along, due to the other Saber being King Arthur, Mordred's mortal enemy.