For those of your eleventh-houring the Fate/Extra CCC SE.RA.PH event in the English Fate/Grand Order, you may have been as confused as me as to the description of this Mission Reward:

Defeat 10 servants from the East

I was doing quests along the eastern arm on both sides, but not getting anywhere. Not to get all B.B. on you, but turns out, they’re referring to East as in East Asian. So you’re looking for servants like this.

I don’t like following guides; I think they detract from the sponteneousity and fun of the game. But perhaps I should cheat a little sometimes to save confusion.