She is not very comfortable around Aiden because he keeps seeing her as the old version of herself and not who she currently is. This is not new knowledge. As I said she strikes me as a foolish type of person. I can easily see her say "Aiden you can't come with me" solely because of how she feels around him disregarding how useful he would be to her in those places. That is my opinion of her based off what has been put in this story. You can disagree with me on her personality but this how Satsuki reads to me as presented in the story so far.
Also she does know she was the former Saintess, she learns that in chapter 9. She really doesn't need to know the contents of her past life to understand that her former position was Important and being Important in any world is dangerous. Unless the original country that she was involved with was the only one in existence at that time, then other places almost certainly have records about her. If people in this world only behaved rationally then Satsuki's past life country wouldn't have been annihilated.
Which, the story has shown, she's basically forgiven him for. Even if he still sees the soul of the Saintess in her, he's apologized. She's not besties with him, but she is also way above Neutral with him. At most, she might ban him for his lack of her "common sense", but she also knows that her knowledge of this world and thus common sense, is also extremely lacking. This means, he probably doesn't share a hotel room with her, he probably gets the room next door.
I meant more that, as the country that was wiped off the map was the only one that held direct ill will towards her. So, unless someone has the very specific appraisal skill to even know she was reincarnated, it won't become an issue(She only found out from the Appraising App, that a literal god made, and might be stronger than any human skill [isekai staple to have overpowered skills]). And assuming the stories from the past are passed down properly, the story that comes down is, you mess with the Saintess, an Ancient Dragon punishes your entire country. So, if someone finds out, they start warning others, buttering her up, and/or treat her like royalty. Because if you mess up, a Dragon melts you.
