Sigma (シグマ, Shiguma?, Σ) is the Master of Watcher in the False Holy Grail War of Fate/strange fake.
Sigma is the product of rape between Maiya Hisau and an unknown soldier. He wasn't given a name and was taken away from Maiya when he was a baby.
Sigma is a mercenary hired by Francesca.
He was first mentioned in Fate/Zero novel. He was indirectly mentioned when Maiya confesses to Irisviel von Einzbern about being a mother. Irisviel encourages Maiya to look for her son after the Fourth Holy Grail War.
Sigma is a Spellcaster. Sigma is supposed to be the one to become True Lancer after summoning Watcher.
- ↑ 1.0 1.1 Fate/Zero - Volume 4: Act 13 -37:02:47, p.089-092