Elah's here, but she ain't here to fight. If you're wondering why she drew her sword, it's to keep her guard up just in case Usaro did anything while she stood between him and Rikku.
Note that Rion's eyes are not back to normal. Elah most likely wouldn't notice. As for what Rion's ready for, I'll leave that for a surprise.
Batuu: Wait WHAT?? GET BACK AND FIGHT EACH OTHER!! >83