I think Bell will ultimately flip sides in the end, with Yakumo and the other government lady voting for Ren while Fubuki sticks with Kyouka despite Ren's attempts to convince her otherwise.
So far she can fly, punch and kick really hard, see extremely far, teleport others, negate peach abilities and heal herself along with at least a couple other powers she hasn't revealed yet, she can only use two at a time however.
All the transformation needs is for her to grab the chain so perhaps he could trick her into doing it. The only problem with this is that its very risky since lending puts alot of strain on kyouka making it harder for her to fight, so unless they planned this ahead of time I can't see it happening.