Sanji has been sentencing people to death since after Wano, but he didn’t killed anyone till now
Perhaps when he declares himself King, he will? I believe so
All that comes to mind rn is the Sanjitution in Egghead, and him sentencing S-Shark like he was a Judge... Perhaps Sanji has to let this part of him take over to awaken CoC? Is that Stealth Black's persona or is it a side of Sanji himself that was abducted by stealth black?
How can a ficctional character be so entertaining