Krio Vin, alternately known as Edward, or Mervin, Starspeeder based on the specific book, was a Sith Lord who also happened to be the progenitor of both Victor and Christina Starspeeder.
Essentially, Krio Vin exhibited the characteristics of a Sith Lord consumed by a thirst for power, displaying egotism, narcissism, and bitterness. His primary objective centered on attaining absolute authority and sharing it within his family circle. Possessing immense arrogance, he considered himself intellectually superior to his ex-wife, asserting her inability to comprehend the potential of the dark side of the Force, and also deemed himself significantly more formidable than Victor and his companions. However, his intellect appeared somewhat limited, as he was easily manipulated by his own daughter. Furthermore, his methods of converting individuals to the dark side involved issuing aggressive demands and brandishing his lightsaber upon encountering resistance.
Krio Vin demonstrated competence as a lightsaber combatant, effortlessly deflecting attacks from three Jedi initiates simultaneously (Coleman Flytrap, Maya Phoenix, and Artemis Oophanoe), and successfully blocking a powerful strike from Mr. Zefyr. He possessed proficiency in telekinesis, utilizing it to immobilize and levitate his son. Additionally, he was a capable pilot.
Krio Vin functions as the main opposing force throughout the Victor Starspeeder trilogy, with Zachary O'Halleran/ZC-04 being the principal antagonist in the primary narrative.