After being sold at the age of 5 with her brother to Jelkala the two were separated, and Cara had shown a propensity of being a skilled entertainer as she quickly learned how to use her charm and wits to keep her master happy. Outside of seeing her brother periodically and doing Jelkala's bidding she hasn't had much in terms of the world outside.
She is pretty shut off from the world today, only thinking about survival in the underworld. She knows as long as she entertains Jelkala she will receive her meals and a proper place to sleep. Though with this mindset letting others get close to her has become difficult which has benefited her during her negotiations with others, and if a deal has gone south she has been known to fairly icy cold and doesn't bat an eye when someone is seriously injured or even killed by others, though she knows when to put on the charm and act properly, she doesn't always show a cold expression after all.
She knows how to act happy, and sad, whatever emotion Jelkala wants her to act she has learned how to do it effectively for him, again to keep herself safe.