Fawkes

Fawkes is a Super Mutant and a possible companion found in Vault 87

Background
Fawkes is kept in Vault 87's Test Labs in one of the cells. He was imprisoned by other super mutants, who saw him as an 'anomaly'. Unlike others super mutants, Fawkes is intelligent and well-spoken, preferring to be called "meta human" as opposed to super mutant. He is one of the original residents of Vault 87 and remembers "walking around this place and seeing other humans in white lab coats and blue jumpsuits." He states that the hallways of the Vault are familiar to him.

A working terminal connected to the Vault mainframe was located in his cell, which he says prevented him from "going insane". The terminal allowed him to study history, literature, science and other subjects, allowing him to become articulate. He dubbed himself "Fawkes" upon reading a historical entry about a man who was "willing to fight and die for what he believed in." He was caught using the terminal by other super mutants, who subsequently destroyed it to "torment [him]."

Other super mutants inside Vault 87 hate Fawkes due to his remaining human traits. They call him a failure, express their annoyance about him talking too much and their wish to kill him. Fawkes remarks that he's "used to being struck about by the others", who keep him around as a curiosity.

Daily schedule
Fawkes lives in Isolation Room 05, a cell in Vault 87 test labs. After freeing him, he greets the player outside of Raven Rock at the final stages of The American Dream. If the player refuses to travel with him, Fawkes travels to the Museum of History and waits inside the lobby. If Broken Steel is installed, after activating Project Purity, he can be found either in the Citadel medical bay or in the Jefferson Memorial.

Inventory
1 No longer carried past the conclusion of The American Dream.

Fawkes is limited in the weapons he can use, and will only equip weapons from the following list. He will not equip any unique versions of the weapons below, including:

Appearances
Fawkes appears

Behind the scenes

 * According to lead designer Emil Pagliarulo, Fawkes is his favorite companion.
 * Fawkes' battle cry of "Wake up... Time to die!" mirrors a quote from Leon to Deckard in the film Blade Runner.
 * When asked about his name, Fawkes answers that it was taken from a historical entry on his terminal, stating it "comes from a man who was willing to fight and die for what he believed in." This refers to Guy Fawkes, an English Catholic who participated in the Gunpowder Plot, a failed assassination attempt on King James I of England.
 * In Alan Moore's V for Vendetta, the protagonist "V" was also locked in cell number five, and wears an iconic Guy Fawkes mask.

Bugs

 * Fawkes is unable to use any unique weapons, including unique versions of weapons he is otherwise able to use (e.g. Eugene vs. the Minigun). This is caused by the list determining what weapons Fawkes is able to use missing the entries for these unique weapons.
 * If you do not free Fawkes and instead take the G.E.C.K. yourself then return after escaping Raven Rock and talk to him the speech options will be the same as if he had come to rescue you from Raven Rock, ("Fawkes, what are you doing out here?").
 * If you kill Fawkes after entering Broken Steel his body may follow you to Adams Air Force Base and back to the Citadel after being taken back via the Vertibird.
 * After a fight Fawkes' Gatling laser may continue to play the sound, even after he has holstered it. Usually it happens if the player opens any containers or their pip-boy while the sound is playing. This can be fixed by saving and then loading the saved game.
 * Other fixes include engaging him in conversation and getting him to fire the weapon again or fast traveling to another location.
 * Fawkes will "not speak" to the player. Conversation dialogue initiates but he doesn't say anything. Pressing the "Activate" button doesn't help, making it impossible to trade equipment, fire him, etc. This forces the player to kill Fawkes to obtain the equipment given to him.
 * Fawkes will not be in the Museum of History after you fire him. He will sometimes be waiting for you at the entrance to The Pitt DLC.
 * Fawkes may have two super sledges in his inventory.
 * Upon freeing Fawkes, if you choose to retrieve the G.E.C.K. yourself and do not talk to Fawkes after doing so, he will not appear outside of Raven Rock. He will instead be waiting in Vault 87. and will react in the same manner that he would as if he were standing outside of Raven Rock.
 * When fired right before turning on the purifier, Fawkes will sometimes wait in the inaccessible area above the entrance to the Jefferson Memorial. Firing Fawkes anywhere in the Jefferson Memorial will result in this happening.
 * He may just die randomly (after having infinite health) possibly by a door or in the Museum of History.
 * While in the Satellite Relay Station during the Death From Above quest, if told to wait, then follow, Fawkes will not move, nor will he move if told he is "fired."
 * Fawkes may not appear at Raven Rock during your escape in The American Dream. This may happen if you decided to pick up the G.E.C.K. yourself.
 * When the player character escapes Raven Rock with low karma, Fawkes will not be recruitable and will instead just wander. He may become unusable as a companion and will freeze in places such as Underworld, Wilhelm's Wharf, etc. Talking to Fawkes and recruiting him does not work and he cannot be provoked into combat. If you do try to recruit with a higher karma level after he denied you previously, he will be registered as a companion and you can't recruit any other humanoid companion. He will not fast travel with the player character anywhere and instead will be stuck at the place he was recruited. He will travel to DLC locations, such as Adams Air Force Base, but will be stuck at the companion spawn areas.