Bumbersnoot is Sophronia's mechanimal, a mechanical that looks like a dachshund. She acquired him after a confrontation with skywaymen on the roof of Mademoiselle Geraldine's. He is fueled by coal and water, which he eats and drinks and which are transferred into his boiler. He also has the ability to store small items in a storage chamber separate from his boiler. This item is then emitted through his rear end.