Bear is a little boy. He certainly proved that when he saw the security guard.
But he's also proved that in other instances. He is highly insecure who tries to hide it by acting what he thinks makes him a "big man" by acting all cocky. He constantly pranks and goads people, knowing that they hate it, but yet he persistently does it and doesn't care. He has now started to keep painting his face, which can be seen as an attempt to hide who he is and try and become someone else in a way.
This makes him a little boy, and I almost feel sorry for him.