Tholos was an Andorian who served in the Andorian Imperial Guard.
In 2151, Thon was serving aboard the Kumari when Thy'lek Shran led a raid on the P'Jem monastery. During the raid Tholos was stunned by Malcolm Reed. (ENT episode: "The Andorian Incident")
Later that same year, Tholos and Shran set out on a mission to rescue Jonathan Archer and T'Pol from rebels on Coridan III. (ENT episode: "Shadows of P'Jem")
In 2155, Tholos served aboard the Ka'Thelan Krotus when it fought at the Battle of Threllvia IV. Shran believed Tholos to have died in the battle. (ENT novel: Beneath the Raptor's Wing)