Text on the left wing states "Paladin of Charlemagne." Text on the right wing states "Rider of Black." Text on the bottom states "Apocrypha."
While I've never actually seen any of the Fate series, I've seen plenty of this character to deem him cute enough to go on the mirage.
I believe I've gotten hold of a better translator, but please do let me know if there's any mistakes in the Japanese lettering. I would like to make it as accurate as possible.