Only a Diamond Can Polish a Diamond.Rando uses his ability to create a dimension under his control outside the normal laws of physics to prevent Chuya's ability from taking effect, revealing that he can also reanimate one corpse at a time within that space as a fighting slave. He proceeds to battle Chuya while the Predecessor appears to battle Dazai. Together, Dazai and Chuya manage to defeat Rando, who reveals his true identity as a foreign spy named Arthur Rimbaud who came to Japan eight years ago with his partner to inspect the reported containment of Arahabaki by the Japanese government. When the two of them fought over its power, his partner was killed and Rando, cornered by the military, attempted to reach out and store Arahabaki within his dimension as his weapon. The release of Arahabaki then formed the explosion. Rando's last words are a guess that Chuya isn't actually the deity itself, but more of a human vessel to control its power, and urges him to be proud of his strength as a human. The job finished, Chuya returns to the Sheep, only for them to try and kill him, having allied with the GSS. Dazai discovers an injured Chuya, having escaped, and approaches him with an offer from Mori to join them to kill their enemies, in exchange for the Sheep members' lives being spared. With no choice, he accepts and decides to join the Port Mafia of his own free will after Mori earns his respect, and is gifted Rando's old hat as a symbol of his membership. Seven years later, Ango is making a note of these events and mentions that Rando's partner was actually still alive, and how Chuya would confront him soon.