Nonagon is a yellow polygon with 9 sides, they have no legs and almost always have a very big smile on their face. When they speak, their mouth doesn’t move. Instead, they gain a glowing yellow aura around them. chaos will unfold if their smile ever leaves their face
he's a peaceful character, priding themself on the large smile they always wear on their face. 
They are agreeable but often get impatient or agitated, he has a reverb voice and refer to using third person talking about himself