True kinda.
I don't know if there are any talk scenes with NPC's after that (aside from River as far as I know - haven't actually done that scene myself as of yet, so I can't say for certain), discussing the Convocation of Mirrors and end result. One would think that there would be talks with NPC's about it though - because it would probably affect their perception of the Seven in some way - but I guess it might be sort of expected for the champion to not divulge that information to everyone... because the unpleasant truth would probably not aid in anything terribly beneficial (aside from the end of the Convocation of Mirrors itself).
That and the God's war stuff would make the end result pretty difficult to dredge up (I'm assuming).
Lord Keros and Mallach both make it pretty clear that there would be very bad consequences for divulging that information, and not merely for the Seven. Review what they have to say.
You may ask; the answer, however, is no.All I would even be asking for is a male Valkyrie.
