The Diashna were tall, lean humanoid beings of ever-flowing black goo. They had mouthless faces with glowing white eyes. They were notoriously lacking in curiosity. (PROSE: In the Loop)
In 2011, the Vault obtained the gooey corpse of a Diashna contained in a piece of ice. Vanessa Hardcastle once noticed Miles Werbiansky examining it. (PROSE: A Worthy Successor)
Diashna were among the species recruited by the Superiors, (PROSE: In the Loop) with Agent Giashnel being a prominent Diashna agent within Superior forces. (PROSE: In the Loop, The Trauma Deception, Rebel Rebel) During the War in Heaven, the Superiors sent Diashna as back up in the Battle of Ciros VIII. (PROSE: In the Loop)