I'm inclined to say that Penny is the Napoleon of the Tranch's Animal Farm. While Kevin definitely doesn't do much of anything on the tranch, he also isn't in charge of anything. Nobody cares about what he has to say, and they only keep him around because he represents income for the Tranch. In Animal Farm terms, I'd say he's more of a
Mollie. For people who don't want to read the link, Mollie is an entitled show horse who doesn't care about the world around her as long as she gets to keep her ribbons and sugar cubes (or in Kevin's case, video games and Troonsformers). Unfortunately, even this isn't as apt a comparison as I'd like- Mollie is smart enough to GTFO while she still can. And of course, Mollie is actually a mare, rather than a flabby, depressed gelding who's on a copium binge.