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

To reiterate, the theories are all equally fantastic on their own gleaming merits! Similarly regarding motivation, both are addressed beginning at the point in this this thread, enjoying oneself is paramount.

An alliance with the first progenitor is the no way that did not happen scenario that would have came out of nowhere. The thing is it’s feasible, if the first is captured what then? Guren could be the one to free him causing Saito to be the initial and highest priority casualty of his betray everyone approach to fixing his problems XD

Guren’s relationship is also different concerning Mahiru-no-Yo the demon and still convinced she may have gone truly off the rails and has her own different demon outcome in mind.

At this point as always simply like reading these possibilities and what they mean for the story, and glad others are taking part as well!