Guo Tahrik mostly sells goth fashions, novels, movies, costumes and a few occult materials.
For some customers, however, she has a special offer: to be take another shape until the next sunrise.
She has some rules:
You must be willing to accept the change.
You must not change others while you are changed.
Harm no one except in defense of self or others.
You will only remain changed until the rising of the next sun.
You really shouldn't break rule 2 or 4.
Serenity had the misfortune to have a customer comment on how beautiful she was in front of her jealous boss. Now she's cheated out of her last week's of pay and having to make a payment on her tuition before long.
When she stops to hide and cry in Choice and Consequences, she's offered a chance to solve her problem.