During the event battle at GB Fest, the sudden appearance of a masked man throws the venue into an uproar. The Gunpla are rendered helpless by the mysterious "Runner Prison" system this man controls. Ryusei, Sana, and Touma manage to avoid it, but then the masked man unleashes an even more astonishing move against the trio.

• Hajime Yatate

• Rie Takahashi
• Yuka Iguchi
• Kensho Ono