Putting that aside, there are some things I have consistently noticed.
A) Something about the Exaltation feels Off to Amu, something Wrong, and it's inclining her to naturally look worse on us then it normally would. If something feels "Off", then it's usually not something proper.
B) Amu's Beams seem to Disrupt the world when augmented with our power. Joint-Wounding Technique should Not be doing that.
C) Something happened to Ran as well from close exposure, and something "Very bad" would have happened if Amu fully passed out without de-transforming.
These all Smack that we're missing something, and our integration isn't as clean as we would like. We can't afford to let this state of affairs go on, the Exaltation is not supposed to harm the host, Ever, if it's happening incidentally, then it's because we've missed something important.
- [X] Write-in (Read between the lines, and you may be able to find hidden options.)
-- [X] There is sufficient circumstantial evidence that our presence is causing negative side effects. The results of a single battle should not have been this taxing, even with the usage of a technique like the heart-beam--which also should not have caused the ripples in reality that it did... Finally, simply observing the Demon should not have opened an avenue for it to observe Amu in turn, there are Rules here it seemed that interacted in a negative fashion with your own. Conduct a careful study of the nature of the world as it interacts with Amu, and devise means to reduce the friction. (TL;DR, we're observing the world, but we're focusing on the metaphysics and structure as it interacts with our host, so we can try to avoid breaking something)
[X] Let them in. Potentially risky.