"You show me your Motion, and I'll show you mine?"
Duchess Vanna is a Turnamancer formerly in the service of Unaroyal, now a barbarian working under contract for Faq. She pledged to Queen Bea that she would only work for Royal sides. She has decreased the time needed to pop Faq's heir Prince Albert by 20 turns, as well as increased production in Faq's other two cities. She also successfully turned Duncan Scone to Faq. Despite this she has no Loyalty to Faq, viewing Jillian as "a barbarian bully with a battle crown." Erf-b3-p160
Vanna is also recruited by Charlie, although not formally being a unit of Charlescomm.Erf-b3-p152 During the Battle of Jetstone, she prematurely ended Gobwin Knob's turn while linked with Charlie. She later linked with Charlie for the second time to turn Stanley's hobgobwin knights.Erf-b3-p18 She leveled once in those two link ups.Erf-b3-p152
Charlie paid Jillian to hire Vanna and send her to Transylvito, ostensibly to help Don King's heir pop, but in actuality to engage in "espionage and seduction stuff" relating to their apprehension of Parson.
After discovering her true purpose, Caesar ordered her imprisoned. But Don King offered her the chance to join Transylvito, which she accepted.
She describes herself as being "kind of in love with her discipline".Erf-b3-p152
She was in a sexual relationship with Duncan, who was emotionally agitated when Jillian sent Vanna away on a mission and even more so when he learned she'd turned to Transylvito. She does not appear to have feelings for him, describing him as "a fine warlord and a good man, but at the turn's end... not even a noble." Erf-b3-p160 The nookie probably began as a Turnamancy seduction (and might even continue to be so).
From the colors of her outfit — those of Unaroyal — it looks like she popped there. She also describes herself as "the last daughter of Unaroyal." Erf-b3-p160 She seems to have a hatred of Stanley and Gobwin Knob just like Jojo does.
Real World References
Vanna is a reference to Vanna White of Wheel of Fortune fame. Before 1997, the letters on the puzzle board were printed on rotating triangular prisms that were turned manually by White. Vanna is also described as having an "elegant hand gesture" that "comes naturally" to her. Erf-b3-p160 (Since 1997, the puzzle board has used computer monitors with touch screens. White still is the hostess of Wheel of Fortune but she no longer turns the letters.)
While wearing her cloak, Vanna has the appearance of a White Mage from the Final Fantasy series of RPGs. This is another allusion to the name 'Vanna White'.