Shu Mai was the president of the Commerce Guild. She came from the planet Castell, and one of the millions of Gossams affected by the horrible economic devastation it suffered. She eventually worked her way up in the Commerce Guild, enslaving her own people in the process. The Guild also swore loyalty to the Confederacy of Independent Systems, supplying Battle Droids to them during the Clone Wars. She was killed by Darth Vader on Mustafar.