Kousuke Ueki is the main character of the manga and anime series titled "The Law of Ueki." He is a high school student who possesses the unique ability to turn trash into trees, which he uses in battles against other contestants in a competition to become the next God. Ueki is known for his strong sense of justice and determination to protect his friends. Throughout the series, he faces various challenges and opponents, showcasing his growth as a fighter and his commitment to his ideals. His journey emphasizes themes of friendship, perseverance, and the importance of using one's abilities for good.