Doyle

Allen Francis Doyle was a half-human half-Brachen demon, a servant of The Powers That Be and one of the three founding members of Angel Investigations. As Angel's link to the Powers That Be, Doyle aided him as an advisor. He also developed affection for his co-worker Cordelia Chase, with whom he never had the chance to experience a relationship.

Doyle was "the first soldier down" of A.I., having sacrificed himself to save a clan of demons as atonement for the sins of his past.