Lemmie tell ya something, when the chance to draw a skeksis comes your way, that is a chance that you take.
You sketch up a skeksis that you hope is impressive (or at least looks suitably foreboding for a five-year-old’s nightmare).

Then you slap in a duh’huurr-de-huurr-de-BEEEEEheehee with a severe case of glandular malfunction and who by the looks of things is also possibly anencephalus, but he has a gun in his butt and may well be dumb enough to use it so you’d best not mess with him by presuming anything.
This whole “spookycute” thing is a matter of fine-tuned tonal balance and deft use of fat bee imagery you see.