Sub-Visser Seven is a rank in the Yeerk military hierarchy. Esplin 9466 held this rank at one point; he achieved it after being Sub-Visser Twelve ("The Hork-Bajir Chronicles"). It was his highest Sub-Visser rank before his promotion to Visser Thirty-two for taking Alloran-Semitur-Corrass as his host body and providing the Yeerk forces with all of Alloran's Andalite military knowledge.