Corr Shaasa was a Duros Centurion of the Order of Keltrayu. Little was known about his early life or recruitment into the Order, though his species suggested he was born in the Vall`to sector. He was considered one of the Order's best diplomats, spoken of in the same category as Chindal. Unlike Chindal, Shaasa used the less aggressive Soresu as his lightsaber combat form. His skills were sufficient for him to be a Centurion, though nowhere near those of the Order's Soresu masters like Eskol Kaartinen and Tesshen Manytrek.
He did not have a military role during the Nightmare War, serving as a diplomat alongside the Royal Integration Corps in areas formerly controlled by the Vagaari Empire. At some point Shaasa served as an instructor at the Royal Diplomatic Academy on Tershin. He served as chief negotiator with the Exoi Kritocracy in late 155 ABY, addressing the Governing Judges and baiting the Acolyte Jepth into inviting the Royal party to the Temple of Incarnate Glory, where Queen Rin Sakaros killed Chohwelk VII, the last Exoi God-King.