Hell's Darling

This is my first Hazbin Hotel fanfic. I haven't been able to watch the show because I don't have Prime so I apologize if I get anything wrong. This is also and AU so some things will be different (Adam is still alive and Lilith has been gone for 10 years instead of 7)

10 year-old Lilli Morningstar is the youngest daughter of Lucifer and Lilith. Born in Heaven among the angels, most of which would bully her, Lilli feels very out of place and alone. She is constantly bullied at school, mostly by an angel named Gabriella (12), the oldest daughter of Adam and Lute. Lilli's Homelife isn't much better. Her mother, Lilith, is abusive and controlling, beating her for the smallest of reasons. All this bullying and abuse causes Lilli to grow bitter towards life in Heaven. She begins spending her nights sneaking out and destroying the angels property and her days terrorizing any angel she comes across...except for one.
Seraphina (10), who is the youngest daughter of Adam and Lute, is also bullied by her sister. Not only that, but her parents neglect her as well, leaving her in the care of Sera and Emily. She longs to create a relationship with her parents, but doubts she ever will. School isn't much better for her either. Once again, she is bullied by her sister and her buddies. Not only that, but she is also friendless...until she meets Lilli, who has no interest in being friends.

Will these two be able to form a relationship as well as gain their happiness and freedom? Will they find a way out of Heaven and find where they belong elsewhere?

Edit: I'm adding 3 new OCs to the story. Lykos the hell hound, Mikayla, and Angela who are both angels (though they don't act like it).