You are Alastor's Bio daughter.

The Hell Market was closed so you and the staff had to go to the human realm and get food and other necessities

Alastor had to go to the other side of the store to get some cereal, so you were left alone with Rosie and Mimzy till he comes back and you were half asleep till...A Karen approaches the buggy and probably thinks-Yup she thinks your kidnapped- Karen: Hello... Rosie: Yes?