Identified as many in the background as I could. I'm not sure about the pair to the left of Keine and Mokou, nor am I sure about the pair behind Koishi, though the hat on the left one perhaps suggests Renko (and thus Maribel on the right).
Would this go in the Reitaisai 8 pool? It has the general Reitaisai 8 tag, but the fighters weren't a part of the tournament.