Bio: Krillin was, in the beginning, Goku's fiercest rival.  They both trained at Kame house under Master Roshi when they were children.  Eventually, they became best of friends, and he joined Goku on his journey for the dragonballs.  When evil threatens earth, Krillin is there, and even though he doesn't do too much, he still tries his best.  Although he looks funny with his lack of nose, lack of white eyes, appearance of dots on his head (domino effect), and most noticeably, lack of hair, he is a great fighter, often said to be the greatest human fighter in the universe.  He does grow hair later in the series, and the reason he's bald is because he's a Buddhist monk.