Princess Cruz was the daughter of Queen Bea of Unaroyal. She was croaked and decrypted in the turns following the Battle for Gobwin Knob. She served very briefly for Gobwin Knob before being dusted by K.C., on her mother's orders.
She may have been Heir to the throne of Unaroyal. With her gone, there was no hope of reviving Unaroyal at a later time.
Real World References
A nod to the Princess cruise line.