- “That's Bauchan - the artful one. He wears whatever head he likes - master of disguise he is. A great liar.”
- ―One-Eyed Jake
Bauchan is one of the three ancient rat gods that make up what is known as the Raith Sidhe. He is a trickster who can take on any form he likes to walk unnoticed in the world.
Bauchan has no set appearance as he is a master of disguise who can look like any creature. In art, he is depicted as a rat without a head, sometimes with many heads before him for his choosing.
In The Final Reckoning, Bauchan appeared as an old rat known as Barker. He acted as though he was barking mad, hence this alter ego's nickname. His mission was to learn the strength of Jupiter so the Raith Sidhe could determine how easy it would be for them to defeat him and return to power. It is heavily implied that Bauchan's return was facilitated by One-Eyed Jake murdering Fletch as a sacrifice to him in the Temple of the Raith Sidhe.