He would just follow you around, never attacking anything.
He would just continually complain about everything and belittle your accomplishments.
"So you need to summon help for Havel eh? I knew you were weak but still..."
"Invader is coming... probably a hacker..."
"So you soloed that boss? Well if I had a upgraded weapon like that I could have too."
"You beat that boss with a broken short sword? Well you sure wasted your time. Life is too short to just hit for 10 damage."
"Do you realize that you have been playing this game for over 400 hours? Do you have no life at all?"