Morpheus is a somewhat major villain in Fallout 1. He is the leader of the cult known as the Children of the Cathedral, which is a front used by the Master to recruit people to turn into Super Mutants. Morpheus was one of the first humans recruited to the Master's cause, and his job is to indoctrinate initiates and make sure they stay loyal. He resides in the cult's Cathedral, on the highest floor. He holds an item which gives access to the Master's secret vault beneath the Cathedral. Morpheus was once a member of a gang of Raiders known as the "Rippers", who were actually supposed to be in the game but were cut. Morpheus is either killed by the player directly or presumed dead if the Master's Cathedral is blown up. You can even trick him into escorting you to the Master.

           Fallout Villains

China | Great War | Vault-Tec

Recurring Groups and Creatures
Super Mutants | Deathclaw | Enclave | Raiders | Khans

Fallout 1
The Master | Lieutenant | Morpheus | Gizmo

Fallout 2
Frank Horrigan

Fallout 3
John Henry Eden | Colonel Autumn | Mr. Burke | Stanislaus Braun | Roy Phillips | Allistair Tenpenny | Eulogy Jones | Talon Company | General Jingwei | Professor Calvert | Wernher | Ishmael Ashur | Aliens

Fallout: New Vegas
Caesar's Legion (Legate Lanius, Vulpes Inculta) | Benny | Mr. House | White Glove Society | Omertas | General Lee Oliver | Fiends | Tabitha | Father Elijah | Dean Domino | White Legs | Think-Tanks | Ulysses

Fallout 4
Conrad Kellogg | Shaun | Mayor McDonough | Arthur Maxson | The Institute | Gunners | The Forged | Eddie Winter | Marowski | Bobbi No-Nose | Lorenzo Cabot | Sinjin | Dr. Chambers | Triggermen

Fallout Tactics
Calculator | Simon Barnaky

Van Buren (Cancelled)
Victor Presper | Joshua Graham