Cassandra is a female customer who first appeared in Papa's Burgeria Deluxe Edition!
Cassandra is described as being "tough-as-nails", a fitting description for someone who wishes to join the royal guard. She is snarky, sarcastic and has a somewhat dry sense of humor. She is also extremely intelligent, often subtly insulting Eugene in clever ways that go over his (what she considers to be very big) head. Despite this, she is extremely supportive and protective toward Rapunzel, her polar opposite—so much so, that she openly holds animosity for Eugene, believing him to be selfish and undeserving of Rapunzel's love and friendship. One of the reasons for this belief is because she feels that Eugene puts his own desires before Rapunzel's, which she expresses to Eugene. In the series, however, their relationship gradually becomes less hostile, and slightly more playful as the two spend more time together. In "Fitzherbert P.I.", Cassandra genuinely admired Eugene's determination to become a royal guard, and actively assisted him in proving his worth to her father. It was later shown that Eugene's quirkiness had started to warm up to Cassandra, who found amusement in his excitement to school the guards as head of a training class.