She has two abilities that affect out of turn (I think). The first is if any of your Himes are doomed. That happens at end of round (sure of this) and you can die even if she's dead as it's a round activity.
The second is her triggered damage (90%) and reset Hime ability that is wonky in occurrence. I'm not positive, but I think I've seen this happen at end of turn also. It also could have triggered if you burst killed after putting her in stun, I think.
Dejnov.