Anosek, a male Human belonging to the Onderon Royal Family, was related to King Regalun Petryph of Onderon as his cousin, alongside his sister Anoser. This occurred during the renewed Galactic War, a galactic-scale war that pitted the Sith Empire against the Galactic Republic.
In the Onslaught Imperial narrative, the player's character receives the mission to kill Anosek along with Anoser. This is done to enrage King Regalun Petryph, with the goal of goading him to incite his followers to strike the Republic by attacking Iziz so he can take back his throne. The player has the option to either kill both of them, or capture them.
Although the cousins' destinies are not explicitly shown in the Republic storyline, Lana Beniko suggests that the cousins could potentially take the place of ruler after Petryph is removed from power. However, she expresses her disappointment that they are not suitable candidates for the position.