Ratscalibur

• Joey, an 11-year-old human boy, later a rat hero
• Patrick, Joey's uncle
• Gondorff the Gray/red, an elderly Ragician (rat magician)
• Parsifur, a vain but courageous knight
• Brutilda, a guinea pig and bodyguard
• Aramis, the King's vizier
• Salaman, a mysterious enemy of Ravalon
• King Uther, King of Ravalon
• Squirrelin, a Squagician (squirrel magician)
• Princess Yislene, King Uther's daughter

There are many allusions throughout the book to the Arthurian legends. The book's title is a pun on Excalibur, the sword wielded by King Arthur, and much of its premise is a pastiche of tales of medieval chivalry and knights errant. Other allusions include the character Parsifur, a pun on the knight Percival; King Uther being an allusion to Uther Pendragon, the father of King Arthur; Ravalon being a pun on the legendary island Avalon; and the legendary "Spork in the Scone" a reference to the Sword in the Stone.

The book also alludes to The Lord of the Rings. Gondorff the Grey is a pun on Gandalf the Grey, and Salaman, the unseen enemy of Ravalon, is a pun on Saruman, a major antagonist of The Lord of the Rings. Gondorff's name also contains the name Gondor, a land from that series, and like Gandalf he takes on a different color. The story's use of several different "races" of animals, some friendly and some hostile, is also an allusion to the many races of Middle-earth.

Other allusions may also exist in the story, including the character Bruntilda being an allusion to Brunhilde, a Valkyrie of Germanic mythology; and Gondorff the Grey being a possible allusion to Henry Gondorff, a character from the 1973 film The Sting.