Screen 1
Sonic stared at the burning houses of Water 7, the flames reflecting in his eyes. Seeing the fire spread toward Tom's home and the nearby streets pushed him past his limit.
For a moment, his expression changed.
His eyes grew darker and began to glow faintly. A dark electric aura crackled around him as his anger surged.
Without saying a word, Dark Sonic moved.
In flashes of speed, he rushed through the burning area and quickly carried Monkey D. Luffy, Roronoa Zoro, Nami, Sanji, Tony Tony Chopper, and the others out of danger, along with Tom.
Once everyone was safely outside the flames, the dark aura slowly faded.
Sonic's eyes returned to normal as he took a breath and shifted back into his usual self.
He looked back at the burning building and said quietly,
"They're not taking anyone else."
Screen 2
After everyone was brought to safety, Tom explained the truth.
Nico Robin had surrendered herself to CP9 to stop a Buster Call, a devastating naval attack that could wipe out the Straw Hat crew and much of Water 7.
When Sonic heard that, he went completely still.
"So she left… to protect us."
His expression tightened, and the earlier anger returned, this time colder.
"She was carrying this alone the whole time," he said quietly.
Sonic clenched his fist and looked toward the sea where CP9 had gone.
"Then we're bringing Robin back."
Screen 3
After learning the truth about Nico Robin's actions, Monkey D. Luffy, Sonic, and the remaining Straw Hats immediately resolved to rescue her from CP9.
With help from Iceburg, they began restoring the old Sea Train Rocket Man so they could chase CP9 to Enies Lobby.
As preparations continued, a faint dark electric aura flickered around Sonic again.
His eyes dimmed slightly, but this time he kept it under control.
He took a slow breath and forced the energy back down.
"Not now," Sonic said quietly.
"We save Robin first."
Screen 4
As the Rocket Man raced toward Enies Lobby, the crew was forced to face the terrifying Aqua Laguna, the massive storm wave that threatens Water 7.
Rain and wind crashed against the train, making it hard to move forward.
Sonic rushed to the front and used his extreme speed along the deck and rails, creating powerful air currents that helped push back and slow the storm's force around the train for a moment.
At the same time, a mysterious masked figure appeared — Sogeking.
He joined the rescue mission as Luffy and the others continued their desperate effort to save Robin.
Screen 5
As the Rocket Man pushed through the storm, Sonic finally decided to explain what the crew had been noticing.
He looked at Monkey D. Luffy and the others and said,
"I have a small transformation form… Dark."
The crew listened carefully.
"When it happens, I become about five times stronger," Sonic continued. "But my personality changes too. I get colder… less talkative… and more aggressive."
He looked down at his hand for a moment.
"That form doesn't really listen to teamwork or alliances. It just focuses on power and the fight."
Then he looked back up and added firmly,
"So I'm holding it back for now."
Be continued