Saber (セイバー, Seibā?) is one of the main characters of Fate/Zero and one of the three main heroines of Fate/stay night. She is the Saber-class Servant of Kiritsugu Emiya in the Fourth Holy Grail War and Shirou Emiya in the Fifth Holy Grail War. She is the Servant of Norma Goodfellow (possessed by Manaka Sajyou) in the Holy Grail War of Fate/Labyrinth. She is one of the Servants of Ritsuka Fujimaru of the Grand Orders conflicts of Fate/Grand Order.

Fate/stay night (Japanese: フェイト/ステイナイト Hepburn: Feito/Sutei Naito) is a Japanese visual novel developed by Type-Moon, which was originally released as an adult game for Windows. A version of Fate/stay night rated for ages 15 and up titled Fate/stay night Réalta Nua (Irish for "new stars"), which features the Japanese voice actors from the anime series, was released for the PlayStation 2 and later for download on Windows as a trilogy covering the three main story lines. Réalta Nua was also ported to the PlayStation Vita. On October 28, 2005, Type-Moon released a sequel to Fate/stay night, titled Fate/hollow ataraxia. Its plot is set half a year after the events of Fate/stay night.