astolfo (sailor paladin) (fate)
Astolfo in his pink and white serafuku that he wears during the Agartha chapter in Fate/Grand Order. "Sailor Paladin" is what he refers to himself while introducing himself to some enemies in the English version (he just goes by "Serafuku Knight" in the Japanese version).
See also
This tag implicates astolfo_(fate) (learn more).