Mull has black fluffy hair that he usually wears in a braid, and wears monochrome clothing with emo aesthetics. He tries to be brave, calm and stoic but often fails and ends up being cowardly and nervous. He can play the flute very well, and carries one from his deceased mother in his satchel which he wears on his chest. Mull often appears anxious and jittery, but seems to think he’s fine and okay with no problems, despite all the horrible people in his life, some even gaslighting him.