He is described as looking like a demented ferret with beady purple and grey eyes.
A banshee can sense when someone's life is in danger and will scream when one is near death. It has been said that if a banshee lies next to someone, their condition is far more severe and the person may be even closer to dying. Bullhorn has laid near or on Sophie three times; when she was near death after having an allergic reaction to limbium, after almost fading away, and after Umber attacked her with shadowflux.
- Bullhorn is, presumably accidentally, called Bullseye on page 337 (hardcover) of Nightfall.