The Adoring Fan is a bosmer commoner living in the Imperial City. After becoming the grand champion in the arena he’ll approach the player wanting to be thier ‘groupie’, saying:
"Wow! You're the Grand Champion! I saw your fight against the Gray Prince! You're the best! Can I... Can I follow you around? I won't get in the way!"
He'll follow the player around and dose not assist them in anyway. He will run in the face of danger, is unable to carry anything, and generally just gets in the way. The Adoring Fan is considered an easter egg to the games lack of multiplayer: others just get in your way.
He will greet you with:
"Yes, oh great and mighty Grand Champion? Is there something you need? Can I carry your weapon? Shine your boots? Backrub, perhaps?"
And just by getting close to him will cause the fan to say:
"By Azura, by Azura, by Azura! It's the Grand Champion! I can't believe it's you! Standing here! Next to me!"