Cassidy is an attention whore, she likes to be center of attention and always made everything for that ( flashy clothes, strange hair color etc..) When she had her car accident, she though it was the end of her life, nobody would look at her anymore. But during her recovery process, so many friends visited her in order to offer compassion and help, she understood she finally found a much more efficent way than artifacts and her natural heterochromatic to be center of attraction : her new helplessness. That's why she never tried to use prosthetics, she prefers to be helped everytime, everywhere..