Sena Kobayakawa

Sena Kobayakawa (小早川 瀬那, Kobayakawa Sena) is the main character of Eyeshield 21. He is a student at Deimon High School who is forcefully recruited by Yoichi Hiruma to become the running back for the school's American football team, the Deimon Devil Bats. To hide his amazing running ability from the school's other clubs, Hiruma disguises Sena's identity with a green eyeshield while he plays, and has him use the series eponymous codename "Eyeshield 21". For much of the series, this is a secret known only to a very big group of people, before Sena grows more mature and confident in his abilities and eventually discards the disguise.

Throughout the series Sena affirms his position in the team as being the Deimon Devil Bats' unquestioned Ace.