Sasaki Kojirou (Fate)

"My role is to guard this gate. I won't let you through alive, nor shall I let you out alive."

- Sasaki Kojirou Sasaki Kojirou, otherwise known as Assassin, is a fake servant summoned during the fifth Fuyuki City Grail War by another servant, Caster. While normally the nature of the grail war would have made any other assassin than Hassan impossible to summon, the fake command spells used to materialize him made him a notable exception in the Fuyuki Grail Wars. Due to this, he was entirely dependent on Medea for mana, and was unable to leave the premises of the stairway leading to Ryuudou Temple, acting as a guard that would ward away other servants and masters from attacking Medea's lair from the main entrance. His placement there made him a hugely capable opponent, due to the close range nature of his environment forcing enemy servants into a close range melee battle, where he held an advantage due to his noble phantasm and skill set.

In the Fate route of the game, Assassin is only seen in a battle against Saber, which ends at a stalemate at first. However, he is never seen after this, assumed to be killed by Gilgamesh alongside Kuzuki when Ryuudou Temple is assaulted by the Archer-class servant. In Unlimited Blade Works, he fights several times against Saber, although he allows her to run to the aid of Shirou Emiya, her master, when he is assaulted by Archer. He even goes as far as to hold back Archer himself, however he is ultimately taken down by Saber in a duel that he himself desired, disappearing peacefully after she escaped the strikes of his Tsubame Gaeshi. Finally, in the Heaven's Feel route, Assassin is assaulted and killed by the entity known as the shadow, and is ultimately used by Zouken Matou as a catalyst to summon the True Assassin, Hassan of the Cursed Arm.

Battle vs. Mayuzumi Yukie (by Leolab)
No battle written.

Expert's Opinion
Both combatants were equally matched, with the natural abilities of Assassin's Servant skills canceled out by Yukie's talent and techniques.

To see the original battle, weapons, and votes, click here.