White Oni:
He the paper grabs the bokken and the civilian escapes. He lets go of the bokken and quickly speeds away from the paper tentacles. He can always get another bokken. Good. She was angry, angry despite the defenses being broken, anger means she is motivated. This can be something closer to a normal fight now. All thats left is to how see how she maintains her current resolve. and perhaps...the nine tails chakra, its highly similar to Kaguyas....maybe it'd be worth experimenting with it on her even if she lacks the resolve at some point. Its not as if he can risk the thing on an actual Jinchuuriki after all- if none of this worked, they were the best hope the world had. He flashes through hand seals.
"Water Release: Water Bullet Jutsu."
A jet of water is unleashed from the darkness of the oni's mouth-opening of the mask at Senko, intentionally at the level most Chuunin would be proficient in.

Kimiko:
The blade begins to burn down its length and Kimiko uses a normal kunai to cut her own blade before it can reach the handle, then puts in some chakra to make sure the paper blade reforms back to normal. The weakness of paper release was getting burned, and her usual techniques clearly was not going to be enough. She forms hand signs and says
"Water Release: Hiding In Mist Jutsu."
and suddenly thick fog begins to cover the area as she expels the mist from her mouth- she intended it to hide herself, but in order to hide properly it covers more than that, putting much of the battle...room? in fog. It does not reach Senko and White Oni. Baku does not see what Kimiko is doing right now.