Vorpal

Vorpal is a felon incarcerated in the High Courts of Yew during Ultima IV.

Description
Vorpal would not reveal the reason for his imprisonment, sardonically claiming that his job was to "eat people who bugged him." Should the Stranger pester him about this, Vorpal would ask if the Stranger was there to bother him. Should the hero answer affirmatively, the villain would attack, crying "Eat death, scum puppy!" as he did.

Despite his unvirtuous and fallen state, the Rune of Justice was hidden inside his cell.

Trivia

 * In the novelization of Ultima IV in Ultima: The Avatar Adventures, Vorpal is portrayed as being much more sedate - expressing his displeasure by largely ignoring the Stranger and passive-aggressively hogging the jail cell's bed.
 * In the Nintendo port of Ultima IV, the prisoner "Vorpel" is a penitent, regretting his past life of crime and using the Rune of Justice as a tool for self-bettering meditation.