Assassin (アサシン, ?) is the Assassin-class Servant of the Strange Tales of the Imperial Holy Grail of Fate/KOHA-ACE. He is also able to be summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.
Assassin's True Name is Okada Izou (岡田以蔵, Okada Izō?). One of the four great manslayers of the shogunate's closing days, holding the alias of 'Manslayer Izou'. The Onoha Ittou Style, the Kyoushin Meichiri Style, the Jikishi Style and such, he learned various styles of swordplay. Involved with numerous assassinations, he was imprisoned and executed for his crimes.
Overly boastful of his own abilities, he has a tendency to look down on all other swordsmen, but reputed as 'One with the sword, swift and nimble as a falcon,' his sword arm was the genuine work of a genius.
Assassin initially portrays himself as Sakamoto Ryoma.
GUDAGUDA Teito Seihai KitanEdit
Assassin declares himself to be of the Manslayer (人斬り, Hitokiri?) class. His Personal Skills are Manslayer, One with the Sword, as Swift and Nimble as a Falcon, and Eye of the Mind (False). He also claims to have the ability to copy the sword styles of others, which is manifested in his Noble Phantasm Settlement Sword.