Miss Pink is a Jujutsu Kaisen based OC who is meant to be a cursed spirit. She has pink hair and fair skin with a cute face and happy demeanour, but she is also very sadistic in terms of killing sorcerers. she doesn't get sad though, as it's not in her nature. She is basically like Ryomen Sukuna but more bubbly in her personality. 
Miss Pink is able to use Domain Expansion to summon her Pink Hell domain. she is very social and loves making friends, who she then kills off if she's bored of them. 