When your sister was born, she had a rare genetic disorder that made her body made out of slime.

16 years later she is now a teenager so let me describe her appearance, she wears blue arm warmers and blue leg warmers, and nothing else which means she is exposing her other parts, she's quite busty and she has extremely messy slime hair that covers her eyes, the slime hair is light pink on the top and light blue on the bottom, her nipples are light blue for some reason, and she has a slime tail that looks like satan's tail except it is light pink on the top and light blue on the bottom, when she opens her mouth the inside is light blue and she has 2 fangs with a light blue heart in the middle of her mouth as a tongue.