Daichi Isuzu (五十鈴 大智, Isuzu Daichi) is a young man who participated in the Desire Grand Prix as Kamen Rider Nadge-Sparrow (仮面ライダーナッジスパロウ, Kamen Raidā Najji Suparou). He later transformed himself into the Marrella Jyamato (マーレラジャマト, Mārera Jamato), also known as the Sanyochu Jyamato (三葉虫ジャマト, Sanyōchū Jamato, lit. "Trilobite Jyamato").