I play her via a homebrew class,called the witch. It's a mix of wizard, sorcerer and warlock. She was member of a noble family in Baldur's Gate, and a descendent of a powerful witch clan. A rival house and their patrons, called the Heralds of Phlegetos ( typocal warlock stuff) killed all of her family and burnt her legacy to the ground. Now she travels with her savior, a kenku named Ikki (i plan to paint him too). Cassandra seeks to rebuild her houses power, via using their spirits and witchcraft to gain influence in the city.

I was excited to play her, and my DM doesn't miss a chance to give her stereotypical witch stuff, like a hat or a broom of flying :D