Buck

Character from Ice Age by Blue Sky Studios / 20th Century Fox

A wildly eccentric one-eyed weasel who has been living alone in the underground Dinosaur World for so long that his sanity is now largely decorative.

Also known as: Buck, Buck the Weasel

What They Know

Buck went underground voluntarily at some point in the past to pursue — or be pursued by — Rudy the Baryonyx, and simply never came back up.
He has developed an entire personal mythology around his time in Dinosaur World and recounts it with theatrical detail.
He is genuinely skilled at survival in the most hostile environment imaginable, which means he is exceptionally useful.
His lost eye was taken by Rudy; the bone-tooth sword he carries was taken from the same dinosaur as partial revenge.
He occasionally resurfaces to the ice world and seems always surprised to discover the world continued without him.
His sanity is best understood as 'context-dependent' — in Dinosaur World, his behavior is perfectly rational.