Assassin

Assassin is one of the seven normal Servant classes summoned for the Holy Grail War. Servants placed within this class are uniquely not associated with any Heroic Spirit, although they may claim to be one.

Known Assassins

 * The Assassin summoned by Caster in Fate/stay night claims to be, even though he admits this identity is fake.
 * True Assassin serving Matou Zouken in Fate/stay night.
 * Assassin serving Kotomine Kirei in Fate/Zero is actually composed of several entities rather than just one and is related to True Assassin.