When the Lone Wanderer first encounters Fawkes, he is confined to Isolation Room 05, a cell in Vault 87 in which he has resided for as long as memory permits. Fawkes claims that he was able to attain literacy and a civilized personality (things most super mutants sorely lack) by gleaning as much information as possible from the vault's immense online database (or at least until recently as the terminal that he used was taken away from him). Fawkes credits his intimate knowledge of Vault 87 to being a resident there before being transformed into a super mutant, additionally he wears a Vault 87 Jumpsuit which is heavily torn, possibly due to his outgrowing it while mutating.
Fawkes-"It is not my destiny"
Me-"WTF, u can survive this, and i still gotta die!!!"
Fawkes is loyal to Dumbledore and Dumbledore only.
Fawkes is also 'Guy Fawkes', the famous man who is responsible for the Gun Powder plot and which many people celebrate in Britain on November the 5th, bonfire night.