This is some thing I thought of in the shower and however you see that it could be pretty heartbreaking

What if Liz and patty weren't abandoned but abused? One day Liz took patty and ran away from home after years of abuse after the sisters found out that they were weapons, after leaving Liz didn't get ANY sleep because she wanted to make sure patty was safe.

After kid took them in Liz would have the same dream almost every night

It would start with Liz and patty on the streets and patty was asleep Liz would look over at patty and close here eyes for a bit and when she woke up in her dream patty wasn't asleep near her

Liz would start to panic

Liz POV in dream

I woke up to patty not next to me and I started to panic

"PATTY PATTY WHERE ARE YOU!?"

3D person POV

Liz left the alleyway where Patty was last seen with her and as soon as she did some one knocked her out and that's when she wakes up

She shoots up from her bed and looks around her room not knowing where the hell she is, after her eyes adjust to the darkness she gets out of bed and walks around the mansion. After a bit of walking around kid will hear her walk by his door and get her to go back to bed