Kakeru Sakamaki

Age : 15
Bike : none
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Kyoichi Shido

Age : 18
Bike : Thunder Emperor
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Makoto Shido

Age : 15
Bike : Neptune
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Taiga samejima

Age : 19
Bike : normal MTB
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Gabu Samejima

Age : 15
Bike : bloody fang
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Sho Yamato

Age : 15
Bike : Flame kiser
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Takeshi Yamato

Age : 41
Bike : Imperial X
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Cera Sakamaki

Age : 18
Bike : imperial galaxy
Note : name to be revealed in the book
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The age of the characters are changed a bit. This is the main cast. The other characters are also used as supporting cast.