Problem is, we don't know exactly what instrument Octavia is using. And it only makes sense that if ponies are a different sizes than humans, that the instruments would be scaled appropriately.
There are a couple size charts floating around on ponibooru, based on the idea that Celestia is about 7-8 feet tall (a decent-sized horse), and comparing the other characters appropriately. I think it ends with the mane cast being about 4-4 1/2 feet tall, if I remember right.
As far as Discord goes: he doesn't technically qualify because a
Complete Monster's actions need to be portrayed as nothing less than reprehensible, to quote the article: "The character's terribleness must be played seriously at all times, evoking fear, revulsion and/or hatred from the other characters in the story." Discord is most definitely
not played seriously at all times. He may fulfill the other criteria, but he quite obviously doesn't fit that one, and according to the article, he needs to fit all five criteria to qualify. Can we move on now?
edited 29th Sep '11 1:12:04 PM by JapaneseTeeth