User blog comment:AquilaeAltair/OnS Theories (S5) - Fifth Theory - Mahiru and Guren. A promise that will last in eternity, and the sacrifice required to save humanity/@comment-36009152-20190902185749/@comment-38762161-20190903034635

Yep, pretty much but even if Mahiru is having her own schemes, I think she does care. She's selfish but even as a "demon" even if she's not one which is something Byakkomaru pointed out, she must have something under her sleeve. The reason why she chose to be a cursed gear relates a lot to the fact that it was a way the first couldn't control her any longer.

We'll find out tomorrow!