Petrov, Sergei

セルゲイペトロフ

Similar to Tala, Spencer (known as Sergei in the Japanese version) received training as a beyblader from a young age. He is tall in stature but is generally a very quiet individual. However, during his battles, his words carry significant weight. He is recognized as a competitive player who dislikes losing, a trait shared by all his teammates.
Spencer underwent training at the Abbey alongside the other Demolition Boys. He was the only blader physically capable of wielding Seaborg's power. In season 1, he strives to please Boris but fails to do so even after defeating Kai, because he took too long. He stays loyal to the Blitzkrieg Boys and shares their disdain for Boris. He trusts only his team and, like Bryan, does not trust Kai to be part of it. He is a character with few lines, yet his statements are always meaningful. In G-Revolution, Spencer's blade, Seaborg, is upgraded to the powerful Seaborg 2.
His beyblades are Seaborg, which uses the Voda Impact and Wave Impact attacks, and Seaborg 2, which uses the Stramolyu attack.