This silly idiot and her universe are my absolute favorites to work with. She was a revamp of a character I used in a roleplay for a few months but I like her much more in this version (and her AUs). She went from a human that decided to become a demon to being the daughter of the devil himself. Seriously edgy, I know, but it's a unique version of the nobility trope that I love working with and exploring.
Currently, I am obsessed with building up her universe and her character development. Her reactions to how humans treat demons (and, conversely, how demons treat humans) are really interesting for me because of my love for psychology. My general take on it is that she really is upset with how everybody treats each other and it gives her a lot of self-esteem issues about being stuck in both worlds and being discriminated against in each. One of her AUs has her being far more well-adjusted, which I have more ideas about at the moment. Overall though, she's the character I put the most work into.