(Character description taken from absoluteanime.com)

Rock Lee is the epitome of hard work and determination.

For many years, this youth with little to no promise continued in his training to someday become a ninja--despite the fact that no one really believed he could ever succeed. He had no skill in controlling his life force (chakra), and therefore couldn't perform even the most basic of ninja techniques. Even his hand-to-hand combat skills were below average.

Yet, after training those hand-to-hand skills for years with heart and focus, Rock Lee has become one of the better known genin in Hidden Leaf Village. He only knows taijutsu (hand-to-hand), but his skills are considerably tough to handle...the speed his body is able to maintain is unnerving, as is his iron will to succeed.

Lee is the spitting image of his young sensei (Gai, the rival of Kakashi); he idolizes the man. His intensity and excitement with his training spread to all aspects of his life (which you can imagine makes him an interesting character to watch). His rosy red cheeks and large, round eyes give away whatever emotion he feels instantly.

An innocent and sweet kid at heart, Lee is on a team of three with a girl weapon specialist named Tenten, and a famed genius of a specialized hand-to-hand combat style, Hyuuga Neji. Neji's fatalistic nature and constant mockery of Lee reinforce the boy's determination to prove himself.

It is this determination that makes Rock Lee great. After years of being taunted by everyone, Lee is willing to destroy himself to prove one thing: that if a person is determined enough, they can overcome any trial.

Lee goes into a drunken frenzy whenever he takes even a small sip of sake. He basically can't have any ever since he ruined a restaurant at one point after the smallest sip. The whole entire event of being in the restaurant was with Gai and was meant as a celebration for Lee's accomplishment of Primary Lotus.

Rock Lee has another fighting style that is seen later on in the series (after the Fifth Hokage arrives). Lee ends up in a fight with Kimimaro and just as it seems hopeless for Lee to win, he drinks a so-called medicine given to him by Gai-sensai. A few seconds later Lee is drunker than Jiraiya at a frat party. At first Kimimaro couldn't figure out why he was having a hard time fighting Lee until he took a wiff of what was in the bottle: sake.

Gai explains to the Fifth Hokage that Lee knows the Drunken Fist Style. Apparently, Gai took his squad to a restaruant to celebrate and during that time Lee accidently drank Gai's sake instead of water. Lee then trashed the restaruant and when Gai woke up he and Neji tried to restrain him. Gai realized that he can secretly give Lee a bottle of sake in order to unleash his drunken fury.

Lee is also called "The Green Beast of the Leaf" by American fans, and called "The Green Beast of Konoha" by Japanese fans.