Onishi Hiroshi (大 西洋, Ōnishi Hiroshi) is a first-year linebacker for the Poseidon and is one of the two tallest high school American football player in Japan.
Onishi is the second tallest player on the team, standing at 204 cm, only 1 cm shorter than Ohira. Onishi has short yellow hair and wears black glasses. He also has a very pointy nose.
- Height = ★★★★★
- Power = ★★
- Speed = ★★★
- Technique = ★★
- Onishi uses scented shampoo and, for some reason, he seems to refer so himself as 'me'.
- The kanji used in Onishi's name are the same as the ones used for the Atlantic Ocean