Olvia and the Ghost Shadow Group secretly protected Robin while gathering intelligence from the regions along the way.
Meanwhile.
Inside Impel Down, Gol John, Banks Joseph, and Baken Alexander of the Hell Special Operations Unit received Devil Base Armor tailored specifically for them.
Gol received the Red Fire Ant Base Armor, Joseph received the Skeleton Base Armor, and Alexander received the Alligator Snapping Turtle Base Armor.
The remaining members—Soland Daniel, Green Charles, and Parkinson Sydney—did not receive Devil Base Armor, but they were formidable in their own right and had developed highly distinctive Base Armor abilities.
After a brief period of adjustment, on April 23, Grand Line Era 1500, Impel Down's Hell Special Operations Unit officially launched an operation against Golden Lion and Red Count.
At Impel Down's port, the six members led by Gol wore Impel Down's distinctive black uniforms. Another 150 prison guards had formed a temporary marine unit.
Among those guards were two hidden CP Agents. Cook pretended not to notice them and approved their applications to join the temporary marine unit.
The two CP Agents were quite capable and exceptionally proficient in Observation Haki.
They had likely come along this time partly to assess Gol and the others' strength, and partly to call in CP Agency experts to surround and capture Golden Lion or Red Count if necessary.
Located in the Calm Belt, Impel Down's weather was eternally sunny.
A battleship borrowed from the Marines had now been taken over by Gol's group. Once Impel Down's distinctive flag was raised, Gol shouted, "All hands, full speed toward Water 7."
"Yes!"
From the port's watchtower, Domino asked worriedly, "Warden, isn't this too dangerous? Those two are both legendary pirate captains."
"Impel Down's dignity cannot be profaned, and it has no need for cowards." After saying that, Cook