Cú Chulainn (クー・フーリン, Kū Fūrin), Class Name Caster (キャスター, Kyasutā), is a Caster-class Pseudo-Servant of Odin summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.

The Norse God Odin, having foreseen the plans of both Goetia and the Foreign God, used Cú Chulainn as a proxy to help him save the Human Order. Cú Chulainn was initially summoned to the Fuyuki Singularity as Lancer, but Odin granted him his Authority, transforming him into Caster and giving him some of Odin's abilities.

Avalon le Fae:Fairy Round Table Domain