Yeah, what @UpSideDownGRUNT said
All the SK characters are ninja's so putting hitomi in there would be stupid tbh... I wish they put Kasumi in it instead of her costume.
@Dark-truth The ikki tousen characters are not ninjas either. They are martial artists who are the reincarnated of legendary warriors from three romantic kingdoms era and the developers Marvelous does the games for ikki tousen which is why they are guest characters in the game.
@Izanagidonutz Hitomi is cool and all, if you read the manga (Battle Vixens) or watch the anime Ikki Tousen were like if dbz and tenjo tenge had a baby also ikki tousen was very popular in the early mid 2000's especially characters such as Kan'U, Ryomou, and Ryofu
And like I said before, Marvelous developed the games for Ikki Tousen which was on the PSP and the battle system is quite similar to Senran Kagura even though it was more of a side scroll beat em' up game and the rip off scenes were half clothed images so it would made sense to add them for senran kagura. And Hakufu was added only because she's the main character,