Vilhona was the Aquar leader of the Sisters of the Crimson Mark vigilante group opposed to Nexcore Mining Corporation operations on the planet Velusia. She was slender and had blue-green skin.

Originally hired by Nexcore as a low-level security officer, Vilhona proved to be a fast learner with a blaster and a vibroblade and was assigned to an NMC research facility. Soon after, she was laid off. NMC claimed budget cuts, but in actuality, Vilhona had learned too much about Nexcore mining operations. After some years spent in unemployment, she ended up in the slums of Mount Hollow, where she formed the Sisters of the Crimson Mark, whose operations centered mostly around disrupting Nexcore, though they were also known to commit petty crimes.