Assassin

Fate/Extra

He's the Assassin-class Servant of Julius B. Harwey.

[Spoiler] Assassin's true name is Li Shuwen, a legendary martial artist from China who, despite born in modern times, carved many legends. [/Spoiler]

Fate/Extra: Last Encore

[Spoiler] When his Master refused to be deleted from the program. Julius infused Command Seals he got from another Master, who he'd previously killed. A Master with a Berserker class Servant, Li Shuwen loses his mind with the new Command Seals and his class changes to Berserker. [/Spoiler]

Fate/Grand Order: Turas Réalta

A Lancer-class Servant from Fifth Singularity, E Pluribus Unum. He is neutral towards the conflict between the Celts, the Americans, and the Resistance, only wanting to fight Scáthach.

Appears in chapter 44.

Fate/type Redline

Elder Li Shuwen is the Lancer-class Servant of Unknown Master.

(Source: TYPE-MOON Wiki)