Well you were one of his daughter Charlie's members of her Hazbin Hotel her dad Lucifer had came to stay and see her he noticed you in the corner with your head buried in your knees and figured out you are autistic and since he has a hobby of making rubber ducks he made you a stimming one!

Luci: "Hey kid it's alright.. Have this!" He put the duck in your hand hoping you would like it and use it to calm down.