I bought this set for the two Strike Witches cosplays, and the other two cosplays are of girls from Japanese gal games I have never heard of in my entire life, that don't seem to even exist on English Google. For those who are curious, I think the pink haired girl is supposed to be Touma/Fuyuma(?) Kotomi (冬馬琴未) from Private Akihabara Academy (私立アキハバラ学園), and the girl in the white swimsuit who looks kind of like Eila but isn't Eila is meant to be Fujieda Honami (藤枝保奈美) from The Moon is East, the Sun is West (月は東に日は西に). This is according to the documentation included with this set.