We all live unique lives.
We are the protagonists in our own story.
We hold the role of the main character irrespective of how rich or poor, fat or thin, short or tall we are. In our lives, we are the main character.

Every other person is simply a cast, an antagonist, a passerby. This is the same with every other person we see or meet on a daily basis. Everyone has a life as unique as ours where they are the main character, the protagonist in their world while others are simply casts, unimportant.