William "Billy" Bannister is the protagonist of the Dragons in our Midst series, and also acts as a main character in Oracles of Fire, though his parts in Eye of the Oracle and Enoch's Ghost were minimal. Gifted with the dragon trait of fire breathing and the ability to sense danger as it approaches, Billy wields the sword Excalibur, throughout the Dragons in our Midst series, but passes it to his good friend Walter Foley for most of the books in the next series. Billy loses his dragon traits in the end of Tears of a Dragon, but regains them in The Last of the Nephilim.