Although she shares some traits with her sister, such as her social awkwardness and a big appetite, Kurome is much more aloof and seems to show darker sides of her when it comes to killing her enemies. She is cold and ruthless in battle, usually ending the lives of her enemies as one would expect from a seasoned assassin.

Secretly, she is very scared of being seen as weak, knowing that, in the Assassination Division, if she became dead weight she'd be taken out to keep her silent. This has a lingering effect of her upbringing, as she almost did suffer this fate, were it not for the drug therapy she later underwent.