"Goat Head Priest" was a member of Joker's gang. He wore an actual, severed goat head as a mask over his priest robes and rosary. He was shot multiple times by Arkham guards during the assault on Arkham Asylum, presumably killing him.
His only known activity with Joker's Gang was participating in the Assault on Arkham Asylum, during which he shot a few Arkham security guards with his machine gun before being gunned down himself.
- In the movie he's shot by Arkham guards before reaching Harley, however, in the novelization he's present and apparently unharmed during her shock treatment.