chronodekar said:
I think I've lost touch with the franchise. Who are these people and which FSN anime/game/manga/whatever do they appear in?
-chronodekar
Naked Black haired girl in the back is Oda Nobunaga, pink haired girl on the left is Okita Souji and the orangae haired girl is the female protagonist.
All of them are from Fate/Grand Order.
The man on the right is Hijikata Toshizou and the man at the front in red is Shimazu Toyohisa.
They are from Drifters, a Manga/Anime by Kouta Hirano, the guy behind Hellsing.