Love this gag manga. It’s hilarious. Erasing the memories of every single one of his incarnations in history and…nope, one of his most devout followers awakens the ability to recall memories of him and recall the memories of him within others. So one can track his location anywhere, and the other can never forget about him. They’re all slowly developing anti-peace capabilities.
Ngl, these girls have gone well past yandere. They're actively gaining skills that can only be used on one person. I don't even think them dying would keep them from him at this point.