|“||Unleash, Imperial Dragon! Pure and free just like my heart, jump with all your might!||„|
Ayumu Yamato is Sho Yamato's younger brother. He joins the group during their return to the X-zone. He used to behave like a maniac and ride without any control when riding MTB's until Koei taught him about control.
He rides the Idaten bike Imperial Dragon (インペリアルドラゴン)
Ayumu has brown hair and brown eyes. He wears a light green checkered shirt with a light yellow sleeveless pullover and blue denim shorts. Despite his cute appearance, he goes mad when he rides his Idaten bike.