Aw, such sweet girls.— Mrs. Cobblepot
Like the rest of her family, she appears to be involved in a life of crime, or at the very least, is aware of it and accepts they're decisions as she was perfectly happy with her son getting involved with the Legion of Doom.
Mrs. Cobblepot appears to exhibit extreme signs of being a Stepford Smiler always acting bright and friendly to everyone and speaking in polite happy tones and acting like everyone's mother. She showed no problems with playing host to ruthless criminals, suggesting that she might be a lot tougher then she looks.
Unlike her brother and son who hold a large grudge against Ivy and Harley for ruining her son's Bar mitzva, she appeared to actually enjoy the chaos and still gave them each a gift bag before they left.
- Both Harley and Ivy enjoy mimicking her tone whenever they speak to her presumably as a form of mockery, although they might also genuinely like her.
- In the comics Oswald Cobblepot never had a sister but in the television show GOTHAM he has a step-sister named Sasha Van-Dahl.