Bit-beast: Seaborg
Spencer (Sergei in the Japanese version) grew up training at the Abbey alongside the other Demolition Boys, groomed from childhood to be a competitive beyblader. He's a large guy who doesn't talk much, but when he does speak during battles, it counts—his words carry weight. Like his teammates, he hates losing and takes the sport seriously.
What sets Spencer apart is his raw physical strength. He's the only one of the Demolition Boys powerful enough to actually control Seaborg's full potential. In Season 1, he tries hard to impress Boris, but even beating Kai doesn't cut it because he takes too long about it. Still, he remains loyal to the Blitzkrieg Boys and shares the team's contempt for Boris, despite following orders. He's suspicious of Kai joining the squad—a doubt he shares with Bryan—and only really trusts his core teammates.
Spencer's a character of few words, but fans often note that whatever he says tends to matter. By G-Revolution, his blade gets a major upgrade: Seaborg 2, a significantly more powerful version of his original.
His beyblades feature Seaborg with the Voda Impact and Wave Impact attacks, later upgraded to Seaborg 2 equipped with the Stramolyu attack.
Content compiled by AnimeList.moe from publicly available sources.
