>>532139574
Ikaruga's outfit is also in the story but it's not available right now, so one of the DW is probably getting it later too. I think Asuka and Yumi didn't come with their shinobi outfits since other DW girls already had them in the first collab too.
By the way, the dialogue I happened to screenshot confirms they come from a different world.

>>532140354
That's the power of the underboob.