Morpheus, (A.K.A. Merpheus, Morpeud, Morphus, Merphus) was the leader of the Unity, but secretly serving the Master. During World War 2, the Unity was formed by him, the Lieutenant, and the Master.
Morpheus was unfortunately killed in the Vault Dweller's stampede toward the Cathedral. The remains that were found, were of his dickgina. The only one who really saw the sight was the Vault Dweller.