Tod is the protagonist of Disney's 1981 animated feature film, The Fox and the Hound, and its 2006 midquel. He is a fox who becomes best friends with a hound dog named Copper, despite the fact that the two are supposed to be natural enemies.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...