Akaya Kirihara: boy in my icon! He activates 'devil mode' when he's playing to injures people via tennis ON PURPOSE, including managing to blind one of the protagonists.
Hajime Mizuki: Manipulative ASSHOLE! Not so much about the physical damage but emotionally manipulates Yuuta Fuji and has a weird obsession with Yuuta's brother. He's just so smart and evil and I love it.
Kevin Smith: Arrogant, stubborn and hurts several players during tennis matches JUST to get the protag's attention. Seriously, he just travels from school to school, smashing people up physically during games of tennis, so Ryoma will notice him.
Jin Akutsu: "In striking contrast to his former karate classmate Kawamura, Akutsu is very violent, stirring up trouble wherever he goes. Akutsu plays tennis violently and is widely known around Tokyo as a young bully. Students at both Seigaku and Ginka have been his victims. " - taken from the wiki!
Prince of Tennis villains
Hajime Mizuki: Manipulative ASSHOLE! Not so much about the physical damage but emotionally manipulates Yuuta Fuji and has a weird obsession with Yuuta's brother. He's just so smart and evil and I love it.
Kevin Smith: Arrogant, stubborn and hurts several players during tennis matches JUST to get the protag's attention. Seriously, he just travels from school to school, smashing people up physically during games of tennis, so Ryoma will notice him.
Jin Akutsu: "In striking contrast to his former karate classmate Kawamura, Akutsu is very violent, stirring up trouble wherever he goes. Akutsu plays tennis violently and is widely known around Tokyo as a young bully. Students at both Seigaku and Ginka have been his victims. " - taken from the wiki!