I hope she does both. Serious OTP potential there. As I said above, they've walked a mile in each others' shoes. Kaiser is not an Irregular, of course, but she's more or less lived as one for the last thousand years relative to the hopeless souls who have gotten stuck at Name Hunt Prison. So while she doesn't truly have the kind of absolute, overwhelming power that Baam does she at least knows what it feels like to have the responsibilities that come with it. I can't think of someone better suited to be a partner to Baam among the characters we've seen thus far.
Probably getting a little too hopeful here, knowing SIU though. Entirely possible, and equally likely I think, that she will refuse to back down from her post and Baam will have to put her down. Freeing her = killing her, in that case. And Baam has to have someone who is so much like him as his first real kill in the Tower. That would be powerful, too.
Weren't you a member of SS Androssi?