honestly I can see that happening sometimes you just know it and ignore it and after everything that happened seems like she could be crying form all the stress or for being free from it.
He should take her as one of his wives, because she needs some good old wholesome love after the life that she's had. With his tech he could probably even restore the youth that she sacrificed back during the war and make her around his age,
I think that her mental state has increased because of the yen seal on her forehead
I think it generally works as an amplifier because of its proximity to the head.