@Logiko Here’s Imu referring to Luffy as Joyboy, stop larping. I’m beginning to wonder if you actually read the chapters at all
I'm glad you point that out since it is something people failed to understand it seems.
Imu confused joyboy for Luffy here. Simply because, like Zou, Luffy reminds him of that. But Imu only is in this state of mind because of this:
Imu seems to be confusing the present and the past.
He thinks Joyboy escaped because he felt that. As such he has been inprinting Joyboy on Luffy since this moment. But until this moment, Luffy was more of a big threat.