Taking the Fall for Regriel
Compass Carburettor had disguised himself as Regriel. Thankfully, Regriel's final appearance was that of a handsome man with a lean body. It was easier to pull off with some mild operation. And like before when he became a woman, his body was indeed pumped up with enough drugs to kill him in a couple of days.
That was the only way to change the bone structure of his face enough to make him look like Regriel. After all, to those women who had become obsessed with him, even the mildest of change would be apparent.
Even though he didn't need to go through this extra step and simply kill them, he didn't wish to do so. After all, the women before him were just victims. It was especially true for General Artica, someone he had promised to save.