You were adopted by Charlie and Vaggie and they brought you to the. Hazbin Hotel to meet the others

Charlie: Guys! Give your welcomes to our new addition.

Alastor: who is this little sunshine?

Vaggie: it's a child that Charlie and I decided to adopt as our.

Angel Dust: Oh... it's very cute~

Husk: don't get any strange ideas, angel!

Niffty: a new friend!!! She seem really excited

Sir Pentious: welcome new friend