Monthan Monthan was the eldest child and only son of the king of the planet Shu - Torun and stood to inherit the throne upon his father ' s death . When the king decided to rebel against the Galactic Empire and attempt to assassin ate their representative , the Sith Lord Darth Vader . Monthan and his sister Hollian stood with their father in the Shu - Torun royal palace ' s throne room while their sister Trios was sent to lead Vader into a trap . Monthan did not attempt to stop his father from sacrificing Trios in order to kill Vader , and the prince was killed soon after when Vader ' s assassin droid BT - 1 murdered everyone in the palace throne room . Biography . Heir to the throne . Monthan was the prince ly heir to the throne of the Mid Rim mining planet Shu - Torun during the reign of his father as king . He had two younger sisters , the elder Princess Hollian , who stood to inherit the title of celebrant warlord of the planet ' s War - Faith , and the younger Princess Trios . During the reign of the Galactic Empire , Shu - Torun provided ore for Imperial building projects , but when the planet ' s ore - duke s became displeased with the Empire ' s required tithes after the Battle of Yavin , the king chose to rebel . The Empire responded by dispatching the Dark Lord of the Sith Darth Vader to investigate why Shu - Torun was not meeting its ore quotas , and the king devised a plan to assassin ate their visitor , which involved Trios leading Vader into a trap while Monthan , Hollian , and the king watched from the throne room . The plan began well enough , with Trios guiding Vader into the Shu - Torun royal palace ' s subterranean abyssal rooms , where a ball was being held ; however , when assassins working for the king , but pretending to be rebels against both him and the Empire , ambushed Vader , the Sith Lord easily killed them all . Vader ' s wrath . Trios then enacted the suicidal backup plan , in which she led Vader into the palace ' s tunnels to be killed by molten lava . Monthan stood by the king ' s side as his father lamented having to sacrifice Trios and did not prevent him from activating the system that would deliver the lava and kill his sibling . Vader was able to once again escape from the king ' s trap , bringing Trios with him as he cut his way out of the tunnel using his lightsaber . With no further traps , the king demanded that Monthan and everyone else in the throne room prepare a defense , knowing that Vader would be headed straight for them . However , the prince was never given the chance to face Vader in combat , as the Sith Lord ' s assassin droid s , BT - 1 and 0 - 0 - 0 , had infiltrated the throne room . After 0 - 0 - 0 gave up on trying to poison the king , BT - 1 resorted to opening fire on the room ' s occupants . The droid shot Monthan , the king , Hollian , and all of the guards present directly in the heart , killing each of them instantly . Vader then brought Trios into the throne room and revealed her family ' s deaths to her , crowning her and leaving her to rule Shu - Torun as the new queen . Personality and traits . Monthan was a human male with blond hair and fair skin . He did not protest when his father attempted to sacrifice his sister Trios in order to kill Darth Vader . Equipment . Monthan wore white armor with golden trim and a blue cloak . Behind the scenes . Monthan first appeared in " Darth Vader Annual 1 " , a comic book released in 2015 . The story was written by Kieron Gillen and illustrated by Leinil Francis Yu .