Media: Ink and watercolours.
While the saying might be “Wolf in sheep clothing”, I wanted to put it on its head slightly in order to illustrate impostor syndrome. While it affects a lot of people, it’s not really a mental disorder. However, the people who suffer from it where they believe they’ve only achieved great things through luck and timing, and not through their honest hard work. Most likely with a root in a lack of confidence, it’s a quite difficult thing to overcome.