Only One is a unicorn, he is a happy one, who laughs at every joke, and always gives a standing ovation, regardless of the quality.

Tribot is a Pegasus, a cynical one, who grumbles at every wrongdoing, and looks at the world entirely through facts.

They share a table together.

This is what I think is called a self-insert? It's a version of it at least. I got the idea from CrackedInkWell's story Seven Self-Portraits.