Cassandra de Rolo

Lady Cassandra Johanna von Musel Klossowski de Rolo is the head of the Chamber of Whitestone and one of Percy's sisters. She is the youngest of seven siblings. As an NPC, she is played by Matthew Mercer.

Excerpt from Percy's Intro
"One day, a mysterious couple, named Lord and Lady Briarwood, came to the court. During a feast held in their honour, the Briarwoods violently took control of the castle, killing or imprisoning everyone who would stand in their way.  Percy awoke chained in the dungeon, only to be freed by his younger sister.  Together, they fled, chased by the Briarwoods' men.  As they ran, Percy's sister took several arrows to the chest and fell."

Appearance
Cassandra is a young woman in her late teens/early twenties. She has dark brown hair with a few streaks of white at her temples.

Background
Cassandra was the youngest child of the de Rolo family. After the Briarwoods took over Whitestone, Cassandra freed her brother, Percy, and fled. While attempting to escape, Cassandra was hit by several arrows and fell. She awoke back in Whitestone as a hostage of the Briarwoods. Over the next several years, Cassandra would originally attempt to aid the rebellion, but it is later revealed that she was feeding the Briarwoods information so that the rebellion would fail.

Archibald Desnay claimed that Cassandra was helping the rebellion.

Cassandra is reunited with Percy and meets the rest of Vox Machina when she is found by Vax. She seemingly has her throat cut by Professor Anders, but this is revealed to be an illusion. She joins the party to fight the Briarwoods.

Cassandra later admitted to collaborating with the Briarwoods so that rebellion would fail.

Cassandra greets Vox Machina as they return from fighting Thordak, remarking they look terrible.

Cassandra is kidnapped by Vecna and disguised as a guard, along with Gilmore and Kaylie. She is accidentally killed by Vex'ahlia, but is resurrected by Pike.

Trivia

 * When Professor Anders cut Cassandra's throat in front of Vax'ildan, it was actually an illusion.
 * Cassandra is the name of a friend of Taliesin in real life, who knows about the show and thinks he's "such a weirdo".