Nosfentor

Nosfentor is the Shadowlord of Cowardice, and is one of three such beings that represent the opposing aspects of the Principles of Truth, Love, and Courage.

Nosfentor first appeared in Ultima V, terrorizing the townes of Britannia in the absence of Lord British, whom the Shadowlords had successfully captured and imprisoned. She was eventually defeated when the Avatar summoned her to Serpent's Hold by calling her name, and casting the Shard of Cowardice (from which Nosfentor originally sprang) into the Eternal Flame of Courage.

The Shadowlords reappeared later in Martian Dreams, in the Avatar's machine-induced dreams. Nosfentor taunted the Avatar with a test of cowardice, which in the end was unsuccessful; the Shadowlord had again been bested.

Nosfentor has not been seen since.

Trivia

 * In Martian Dreams the Shadowlords were given genders, and Nosfentor was revealed to be female.