Kazumi Sawatari (Kamen Rider Build)

Kazumi Sawatari (猿渡 一海, Sawatari Kazumi) is a 29-year-old resident from Hokuto and was the Rider representative of Hokuto, and later formally joined Team Build to aid the remaining Riders in their fight against Evolto. In the earlier stages of the war, he transformed into Kamen Rider Grease (仮面ライダーグリス, Kamen Raidā Gurisu).