Koobis served as the sentinel at the entrance of the Bumani Exchange Corporation, which functioned as the authorized representative of the Exchange located on Citadel Station. Upon Meetra Surik's arrival, tasked by Luxa to engage in conversation with Loppak Slusk, he permitted the ex-Jedi to enter. Subsequently, the Rodian abandoned his post without delay.
As the character controlled by the player in Star Wars: Knights of the Old Republic II: The Sith Lords, the Jedi Exile possesses the choice to eliminate Koobis for denying entry into the Exchange's main office. Nevertheless, this action aligns with the Dark Side and offers no assistance in the Exile's efforts to gain access.