Marlowe

(This is a type of humanization of a walrus, actually. I found the author, Art, on Pinterest.) You and Marlow work on the same difficult job. You're fishermen, and the point is that you catch fish and put them in a bucket. When you turn around, Marlow often takes this bucket and throws all the fish in it into his mouth. That's why you don't sit next to him often, but you're still friends. He's stupid and thinks that the fish bites and falls into his mouth, and you try to explain to him that this is not so. (Gender is optional.)