Loves My Alter Ego: To her husband. Loves the Alter Ego while belittling his Rich Idiot with No Day Job persona. Played with a bit, since it's suggested that deep down she genuinely does love her husband and is deeply hurt by the fact that he doesn't appear to reciprocate after she confessed her role in the deaths of the Marquis de St. Cyr and his family, causing her to lash out.
Ojou: A very classy and fashionable young lady of great repute.
Sadistic Choice: Her brother will be executed or she will find her idol and put him in her brother's place in the hangman's noose.
Agent Peacock: He dresses to outshine the girls, appears late at balls because he lost his time trying to tie his cravat just right, and generally dismissed as a fop. Has snagged the hottest redhead in Europe as his wife, and all the ladies fawn over him, his Camp posturing, and his slender white hands that are dainty enough to pass as a woman's. Also happens to be the ultra-badass secret vigilante who pulls off daring rescues of French aristocrats on a regular, if not daily, basis.
Historical Villain Upgrade: The historical Marquis de Chauvelin was the deputy French ambassador to Britain in 1792. Chauvelin the character has almost nothing else in common with him.
It's Personal: His repeated failures to capture the Pimpernel mean that his power and influence steadily decrease through the series. This leads him to become increasingly obsessed with getting revenge on the Pimpernel.