>>545554174
For those stuck on 1-07 (Krolik stage) she is susceptible to stun, taunt, and command prohibition. She can also be movement debuffed so applying Frigid also works also since that makes her unable to move.
One easy method of killing her is to simply bring Nagant. She doesn't need her expansion key. As long as Krolik has a defense debuff Nagant will stun her two times in a row (Enemy Krolik gets two actions in this event so she must be stunned for two turns). To guarantee the defense debuff condition is met just bring QJ along. And while Nagant doesn't need her key for this to work, it is simpler if she has her key since you get one stun for free. I did this without the key though so you can save 3 cores if you want.
You still have to contend with her overburn damage so make sure you heal it. Space your dolls two tiles apart so Krolik can't position between two dolls, otherwise she may not move on her 2nd turn and then Nagant's passive won't proc since her ~~vision~~ passive is based on movement. If you don't like the Nagant method then try loading her up with taunt, Tololo Stun, and movement debuffs, especially Frigid which makes here unable to move at all.