Callahan is the proprietor of the Shining Serpent Inn. His inn was where the counterattack against the Zombies invading the Beggar's Nest was coordinated, in no small part thanks to Callahan. His main concern, however, was that he cuold not receive shipments of beer so long as the district was quarantined.
He runs a "Eat the Most Pickled Eggs" contest annually, which the undead hunter Drake won two years in a row.
- "This is one of Neverwinter's many fine purveyors of spirits. He is dressed plainly, wanting to appear friendly and unassuming to his customers." (NWN "Examine" Description)
Callahan is a character in the original campaign of Nevertwinter Nights.