Nariaki Utsumi appears to help Build prepare for the proxy battle with Grease. This chapter takes place immediately after Sento obtains the Fullbottles from Hokuto and Seito in Episode 21, but one week prior to the scene where Build charges at Grease at the proxy duel.

• Shotaro Ishinomori
• Yoshimasa Akamatsu

• Katsuya Kobayashi
• Atsuhiro Inukai
• Yuki Ochi