Webster was originally a lab rat for the villainous corporation Para-psychological Studies Institute also know as PSI. He was literally a lab rat- the little small four footed kind with white fur and beady red eyes. Somehow, nobody knows how, he gained an amazing intellect, photographic memory, and various psionic powers. Maybe it was one of the many serums they tested on him, maybe his genes were spliced, maybe it the result of many disparate experiments acting together, the final outcome greater than the sum of its parts. In any event, Webster slowly gained these abilities and kept them secret. Slowly learning his situation, he escaped from his cage and discovered something that would change his life - Webster's Unabridged dictionary (3rd ed.) While avoiding PSI security sweeps, traps, and rat poison, he learned.
Eventually his lab was raided by the ACADEMY, and Webster was liberated. At this point he still only seen as a pet, but as his powers, intellect, and ability to communicate grew, to say nothing of overcoming his original mistrust of humans, he soon became a trusted and vital part of the Academy.
Webster has a strength of rat his size who engages in moderate regular exercise. However, his telekinesis lets him reach and lift even the largest books easily. This along with his abilities to teleport, to fit in any nook and cranny, and a touch of OCD, makes him the perfect librarian. Since he usually lives in the Library, he sometimes forgets that that it is not his private collection. Although he loves it when someone comes in asking for help to find a good book to read. He has read almost 20% of all the books in the library, so he is sure to have an opinion on just about any suggestion.
He has very sophisticated and expensive tastes, but since he does not take up much space and does not eat much, he still saves enough to invest. For example his "big screen" TV is 28 inches, which he uses to watch his soaps.
"Look at this mess! Jane Austen's "Pride and Prejudice" is next to Gibbon's "The Decline and Fall of the Roman Empire." Don't these students know the basics of the Dewey Decimal System? This place is like a… chamber of horrors! And no, I was not going to say rat's nest. I have a wonderful Pravda cushion from Bloomingdales thank you very much."