a king, prince, magical wizzard, blah blah blah usually lives in an impenitrable place except . . . you really can just stroll right in if you know the deal.
a 'Troll at the gate' is usually a thing who is a gatekeeper to the 'guru' or 'self-importnat potentate'.
and surrounds himself with difficult and impossible people to fend off the suck-ups and usurpers, and foreign bait-boy emmissaries.
the 'baker discord' punch-n-judy constant double bake is the 'troll at the gate' discord to fend of those unworthy (who don't know to filter and move along.).