Sigma (Fate/Strange Fake)

Sigma (Σ) (シグマ, Shiguma) is the "True" Master of Watcher in the True and Fake Holy Grail Wars of Fate/strange Fake. Despite having summoned Watcher, the Shadows of Watcher claim that it is not meant to be a participant of the Holy Grail War, but rather a guide for Sigma himself to become the True Lancer (真ランサー, Shin Ransā) Servant of the War "while living."