She's elegant and intimidating. Intelligent and tricky that she could fool demons into deals that they can't refuse. As she has studied their biggest weakness and use them to her advantage and even studies their powers for her own needs.
She's very confident and self assured. Especially in regarding her looks. She's not afraid to show off her body. She loves to seduce men and women with little to no delay. This also makes her very manipulative.
Lyllith comes from a long line of witches and warlocks. Her parents practiced the dark arts and forbidden black magic that eventually got them kick out of their coven. She grew up being fascinated by her parents and enjoyed learning from them. From a very young age, her parents even brought her into special rituals. She was a fast learner, too. And passed all of the lessons that were taught to her and even surpass her parents.