Plumba was a male Human who sat on the Imperial Ruling Council until 5 ABY. He was a member of the Cabal during Sate Pestage's reign, and later was one of the three Tribunes, along with General Paltr Carvin and Challer. He was killed by an agent of Ysanne Isard, posing as an antiques dealer, with a Sith lanvarok as part of Isard's coup against the Tribunal triumvirate.