Kaitani, Riku

甲斐谷陸

40-yard dash record: 4.5 seconds
Bench Press: 60 kg
1st Year Student (Grade 10)
40-yard-dash: 4.5
An exceptionally swift grey-haired boy who happens to be the one who taught Sena how to run. When Riku was in elementary school, he witnessed Sena being bullied and used his speed to rescue him. After that, Riku taught Sena that if he could run fast, he would never be bullied again. Sadly, Sena used his speed to become a gopher (though it is ironic that being a gopher is what helped build up his speed). Riku soon left Sena's school because his family needed to move, but he and Sena meet again later in the series. Like Shin, he was able to quickly deduce Sena's identity as Eyeshield 21.