Assassin
アサシン
About
Assassin's identity is that of the legendary Persian "Old Man of the Mountain," Hassan-i-Sabah the leader of al-Assasīn. Assassin serves as the Servant of Kirei Kotomine in the 4th Holy Grail War, his unique trait being that he can manifest as multiple entities at once. (Source: Wikipedia)
Anime appearances
Fate/Zero
Role: Supporting
Fate/Zero Remix
Role: Supporting
Fate/Zero: Onegai! Einzbern Soudanshitsu
Role: Supporting
Fate/kaleid liner Prisma☆Illya
Role: Supporting
Fate/Zero Cafe
Role: Main
Fate/Grand Order: Shuukyoku Tokuiten - Kani Jikan Shinden Solomon
Role: Supporting
Fate/Grand Order: Fujimaru Ritsuka wa Wakaranai Season 2
Role: Supporting