Unpredictable Dreams' second Blader is Jyura Rex, known as the Undefeated Killer. He is known for his ferocity, and is overwhelmingly popular with fans looking for thrilling battles. The crowd erupts in cheers as Rex appears! From start to finish, Rex keeps jumping around and rampaging, repeating unpredictable onslaughts, forcing the Personas into a difficult battle. Bird and Multi are worried about Masked X in this battle where they don't know what's going to happen, but Masked X, who approaches the battle as usual, uses an unexpected strategy!?