German/English Name. Voltair

Age: over 50

Japanese Voice: Kouji Ishii

Souichiro is the rich grandfather of Kai and the leader of the Biovolt Cooperation. His goal is to take over the world with the help of a Bidbeasts army. For this he has used his only grandson too.

German/English Name: Boris Balkov

Age: over 50

Japanese Voice: Takehito Koyasu

Volcov is the leader of the Volcov section in Russia and the team manager of the Demolition Boys. He is a Russian criminal and scientist who works with Souichiro to take over the world.

German/English Name: Tala

Age: 16

Japanese Voice: Chiaki Marita

Team: Demolition Boys

Bidbeast: Wolborg

Yuri is the leader of the Demolition boys who is a very quiet guy and knows how to use words. He was undergoing an operation of Volcov, which has powered up his human senses, muscles and nerves. So he became the human weapon of Biovolt Cooperation.

German/English Name: Spencer

Japanese Voice: Tomokazu Sugita

Age: 16

Team: Demolition Boys

Bidbeast: Seaborg

Sergei is a member of the Demolition Boys and probably the tallest of them. He shows no mercy to his opponents and is very quiet.

German/English Name: Bryan

Age: 16

Japanese Voice: Wasabi Mizuta

Team: Demolition Boys

Bidbeast: Falborg

Boris is a member of the Demolition Boys too who can turn the normal wind to a dangerous weapon, which he has used against Rei. All of his emotions have been surpressed besides the feeling of hate and the belonging for winning.

Japanese Name: Ivan

German/English Name: Ian

Japanese Voice: Aya Sakaguchi

Team: Demolition Boys

Bidbeast: Wyborg

Ivan is the smallest member of the Demolition Boys who has a long nose. Probably he is the youngest and weakest member among them too.