Festus Krex is a Breton mage assassin and member of the Dark Brotherhood. He loves destruction magic and is boastful of his skills claiming to have been casting simple spells at a year old, doing complex incantations at three, and resurrecting corpses at seven. At thirteen he burned down his family’s house with a poorly placed lightning spell but mastered his skills after this event. He taught at the College of Winterhold but left after two years to join the Brotherhood saying it was "too simple, too safe" and that they did not appreciate the ‘glory’ of the destruction school of magic. He can regularly be heard complaining about everyone using weapons and suggesting that magic could get the job done just as well. He helps the player gain information on the Gourmet’s identity.
Festus Krex dose not get along well with the other Brotherhood members and doesn’t want to know them, calling himself "the cranky old uncle no-one talks to." He is highly critical of Astrid and believes the Brotherhood should return to the old ways.