There was a Robot Chicken sketch about that! 4 ice villains come to rob a diamond; Mr Freeze, Captain Cold, Icicle...and...Chillblaine. All of them with Freeze rays. "It took me years of cryogenic research to make my freeze ray..how come you high school dropouts keep making them?!" Victor Fries (Mr. Freeze)
I am gonna have a hyperthetical guess to what’s going on with Harley and her sleepwalking, i think she is trying to suppress her feelings and try to turn over a new leaf as the good guy but she can’t leave her villainy past behind her cause that’s what all she knows and she has insecurities about herself where she is thinking to herself can she change and become a better person i think that’s what she is worrying about leaving her villainy past behind her and i think deep down inside she wants to change, but i think she is worried that she’s losing her Harley Quinn self within her i think that’s what is going on with her, that would explain the sleepwalking as well. We saw an earlier episode of her dealing with how she is trying to become a better person and leave her villainy aside and when she was at that villainy resort she kinda felt lost cause she was not the person she was before and i think she is struggling with herself. But i generally believe she wants to change but i think her villainy past is holding her back in some capacity.
