User blog comment:Imouto-tan/Deyanira/@comment-4867780-20161217035100/@comment-4867780-20170111071447

So she basically put her long confinement to good use via self-taught physical and magical training (not to mention resolve sharpening) ? Wow ! Many villains (and heroes) would have a lot to learn from her in terms of pragmatism and determination. Her multiple personalities in place of memory vessels is a nicely immersive touch as well, perfectly suiting her as an alternate universe Sherria.

So Deyanira was essentially a latent Celestial Beast who had a forced fusion dance with another Celestial Beast ? No wonder she turned out so monstruously powerful, especially after polishing her skills for thousands of years.

It seems Shiro got real lucky between Deyanira's momentary vulnerability and his wielding of pretty much the greatest weapon in the setting at the time. I guess he was really lucky in death as well, to be killed by before she eventually broke free. Even his torture technician expertise would have paled into oblivion compared to what she had in store for him ^ ^;