Keiji Uraga (浦賀 啓示, Uraga Keiji) is the main antagonist of Build NEW WORLD: Kamen Rider Grease. He was the second leader of Down Fall who transformed into Kamen Rider Metal Build (仮面ライダーメタルビルド, Kamen Raidā Metaru Birudo) and later uses the White Pandora Panel to become Phantom Build (ファントムビルド, Fantomu Birudo).