Master Roshi
Master Roshi is not very active on DBZ though I think he probably was on DragonBall. He once trained Goku and taght the famous Kame-Hame-Hah to him. Krillin was also trained by Master Roshi. No training takes place in DBZ though. He is much to old to fight and so he does not do to much fighting on DBZ. He was once the most powerful man in the world but now he just sits around on his island with his pet turtle. He does do a little fighting in the DBZ movie "The World's Strongest." But besides that Master Roshi doesn't really do anything. Oh yeah, I read on a few websites that he had a thing for Bulma. I don't know if thats true but I thought I would put that down to see what you thought.
Here are some of the Master Roshi Pictures I have found!!
