You jumped the gun on me.
That was how I found out about these comics. I discovered to my shock the original version of Princess Pony Head. It turns out that she was one of Star's delusions, which always showed up to to give her a pep talk. The thing is, Star's idea of Pony Head included contorted eyes, sharp teeth, and most stunning: blood and guts always gushing from the neck stump.
Man, that totally stunned me. Princess Pony Head originally was such a dark and gory idea. On the other hand, she now makes a lot more sense. Now we have the TV version, where PPH is real, but is just a spoiled princess, and she's part of a race of pony aliens that for some strange reason have no bodies.