I added the tag “The Council of Tall Rulers” lets see if we can make this a thing.
Also, I imagine Discord shows up sometimes, claiming to be the Ruler of the Chaos Realm. Celestia is so used to him by this point that she just pours him a cup of tea and gets on with her day.
TV Tropes calls it “Large and in charge”
facebook.com/invaderzim/videos/invader-zim-my-tallest/2557848660907361/
Also, I imagine Discord shows up sometimes, claiming to be the Ruler of the Chaos Realm. Celestia is so used to him by this point that she just pours him a cup of tea and gets on with her day.