Diarmuid Ua Duibhne

Diarmuid Ua Duibhne is a loyal knight summoned as a Heroic Spirit by Kayneth Archibald El-Melloi for the Holy Grail War. He follows a strict code of honor and relies on his martial prowess to fight through the conflicts of Fate/Zero. Driven by duty, he seeks glory and redemption while maintaining complete integrity in service to his master.