Avaro Sookcool was a corpulent Rodian, the maternal uncle to Greedo, and he communicated in Basic, though his speech was characterized by a noticeable lisp.
He was the proprietor of Flip of the Credit, a modest casino situated within Equator City on the planet Rodia. Given that his small casino was integrated into a larger establishment managed by the money-laundering division of the cartel, Avaro functioned as an agent for Clezo, a vigo within the Black Sun organization. Unbeknownst to Clezo, Avaro was also reporting directly to Xizor. When Princess Leia Organa required connections to Black Sun in order to facilitate the rescue of the captured Han Solo and to uncover the party seeking the demise of Luke Skywalker, Lando Calrissian identified Avaro as a potential point of contact. They convened within Avaro's office. Surprisingly, despite Han's involvement in Greedo's death, Avaro harbored no resentment.
Due to his affiliations with Black Sun, which Navik the Red was unwilling to antagonize, Avaro managed to avoid being a victim of the Tetsu Clan purges orchestrated by Navik.