"A riot broke out in Water 7 a while ago, and it involved the Straw Hat Pirates. Perhaps CP9 switched targets then?"
Nico Robin had found intelligence about Water 7. Many of its shipyards worked with the Karn Chamber of Commerce, so intelligence agents had been stationed there too. However, Water 7 held little value, so the agents Robin had sent had not infiltrated very deeply and knew only bits and pieces about the riot.
Karn wiped his hands and said, "Those useless fools tried to seize Pluton's blueprints, but the Straw Hat Pirates burned them in the end. After that, they received a mission concerning us. Besides gathering all the intelligence they could, they were to watch the Devil Child, Robin. The World Government has noticed you.
"Robin, did you forget to wear a mask a few times when you went out?"
Nico Robin said, a little embarrassed, "Once, I forgot how long the Polyjuice Potion would last, and my real face was probably exposed for a few minutes. It seems someone from the World Government was there at the time. I'm sorry, boss, I-"
"What are you apologizing for? Isn't it those scum from the World Government causing trouble? It's not your fault."
Karn had a habit of wiping his hands after every experiment. Although magic cleaned them more thoroughly, the habit was hard to break.
"Hang their bodies over Rainbase's city gate later, and leave them there for ten days. The Karn Chamber of Commerce has a temper too. Then start recruiting, Robin. Since it isn't convenient to expose the Biochemical Mechanical Warriors, we can only expand our strength in the open."
Nico Robin felt warmth in her heart at Karn's words. Her boss might have been something of a scumbag, but his intention to protect her