If you didn't see this coming then you don't know me very well! The logical conclusion was to draw HIM in the PSG style because he really seems like something that would be on the show. I would go as far as to say that the demons of PSG are at least somewhat inspired by Him.
I used reference of the Demon Sisters for this, mainly [link] this picture to get the legs right.
I actually used Pinkie Pie's mane for reference on his fluffy collar and skirt-thing (never was sure what that was, the end of his dress or a tutu)