Fate/Zero Lista de Filler

Saber is Kiritsugu's Servant in the Fourth Holy Grail War, a legendary swordswoman whose rigid code of honor and idealism about kingship repeatedly conflict with her Master's cold pragmatism.

Kiritsugu Emiya is a cold, professional mage-killer hired as a Master in the Fourth Holy Grail War, whose ruthless pragmatism and utilitarian philosophy clash with the Servant he summons.

Kirei Kotomine is a Church-affiliated priest and Master in the war, whose fascination with his own moral emptiness and search for meaning drives much of the story's darkest turns.

Waver Velvet is a young, underestimated magus who summons the Servant Rider and is gradually transformed by their partnership over the course of the war.