Amden vor Keioidian was a male individual who held the corporal rank and served within the ranks of the Republic Army. He fought in the Galactic War that pitted the Galactic Republic against the reconstituted Sith Empire. Keioidian became a member of Sergeant Shanra Immel's squad, and their mission was to take out a spaceport situated on the planet known as Kalandis Seven. During their advance toward the spaceport, Keioidian suffered severe injuries and was abandoned by his squad as they continued onward to complete their objective.
In the year 3640 BBY, Amden vor Keioidian, a male being, served as a corporal within the Republic Army and was a member of Sergeant Shanra Immel's squad. During that year, amidst the Galactic War fought between the Galactic Republic and the reconstituted Sith Empire, Keioidian and his squad collaborated with Republic Special Forces Division Colonel Jace Malcom in a battle that took place on Kalandis Seven, a desolate planet located in the Inner Rim.
As the battle unfolded, Keioidian and the squad received orders to destroy a spaceport controlled by the Imperial forces in the area. While en route to the spaceport, Keioidian sustained injuries when Imperial Military personnel ambushed him and the squad. Immel attempted to use an autodoc to treat his injuries, but the device indicated that Keioidian's condition was critical. She and Colonel Malcom briefly argued about whether or not to activate Keioidian's med tracer, a device designed to allow Republic forces to locate and retrieve wounded soldiers later. However, activating it carried the risk of Imperial forces intercepting the signal and killing the injured soldier before a rescue could be attempted.
Ultimately, Immel decided to activate the tracer and instructed the squad to proceed, leaving Keioidian behind. Before leaving, Colonel Malcom assured the corporal that he had made both the squad and the Republic proud and promised that they would return for him.
Amden vor Keioidian made an appearance in "The Last Battle of Colonel Jace Malcom," a short story penned by Alexander Freed. This story was featured in the 137th issue of the Star Wars Insider magazine, which was released on October 23, 2012.