Not sure exactly what you mean but they looked the same as the angels attacking Korea

She said it herself, she's loved Ash since they were kids. Till she knows MC is a different person, there should be no serious romance between them, much-less marriage, which is what a engagement is a promise to do. Short of actually informing her (these kind of stories often have that as a unnecessary secret), starting over from scratch with their relationship is second best approach solution. But even discarding that Ash and MC are different people, all the other stuff is still alot of baggage that should be discarded.

Of course she should also be made aware of the possibility of MC leaving this world and the moral danger MC is in on a regular bases.

What makes you think Ash is "dead"? It could be that when MC leaves original Ash comes back.

Everything else aside, your description doesn't apply here. She thinks MC is someone else, loves someone other than MC (Ash), and MC has known her for all of a few days to a a few weeks.

Plus if MC doesn't die, which is highly possible based on the idea of the series (plot armor is meant to be invisible) MC would maybe leave this world and she doesn't know that.

Exactly! That woman as well managed to merge their powers to their real self. Of course they weren't dealing with such a insane pushy personality as evil eye.

Such a genius to do the merge that at least two others managed right way. Well they didn't have the insane personality of evil eye pushing back so much though.

On the romance note. Exactly!

Do these other people see women as nothing but sex objects and tools that they say the only good option is to get directly immediately romantically some useful woman? They know MC as someone entirely different, know nothing about MC's real situation, and MC has death and leaving this universe as possibilities in the not too distant future.(meaning either way leaving her) No matter how horny MC may or may not be, emotionally as a person it's all sorts of wrong (including wrong for MC's emotions as well as for the woman's emotions since they are getting involved with someone they don't know and might leave them soon and they don't even know MC might leave them soon!) to act like these people seem to want MC to act.

Seriously, consider someone throwing themselves at you where you might leave them tomorrow or shortly, they have no idea you might leave them like that, and they think you are a entirely different person and they love that entirely different person, not you, yet anyway. It would hurt my heart to take advantage of that just for hormones and sexual release. It would also hurt my heart to think that when they see you, they think of a entirely different person. Guh!

And that's not even talking about all the dead weight (like the arranged marriage and political motivation to marrying a royal) to any relationship MC is discarding by starting from scratch, like Ash said. Plus this way she gets to know the real MC.

If MC really was that horny it would probably be better for all involved to just use prostitutes or something. Not saying MC should, just saying it would be a better alternative then what they seem to want.

It is fair to say 'we don't need the romance in our action story' But this is a better way to add romance than some alternatives.

MC getting romantically involved with essentially someone elses love interest considering everything is much worse.

I suppose 3 years and maybe MC is out of there. otherwise the empire taking over in 3 years, you still have many of the same issues.

Once again MC steps into morally troubling waters. If the promise to kill off a entire planet is real, obviously extremely morally wrong. If you try to morally justify that with these beings being too dangerous to the rest of the universe, then giving them great power is very morally wrong.

I suppose both could be lies. Lies would not be as morally wrong as either of those possibilities. But I don't recall MC ever lying about such things before, at least the power up side anyway.

A insane definition of "cheating" anyway.

For both their sakes, MC needs to if MC wants a romantic relationship with her.

If MC is seriously considering dating her, at some point MC has to reveal the truth about MC's existence in this world and the uncertain wild future.

Talking emotionally, not some weird ass arranged marriage thing. Emotionally Ash has not "cheated" on the princess, who didn't even want to get married! Who barely knows either Ash or MC.

I remember that the King announced that engagement, meaning it could easily be against both their wills.

What makes you sure TG didn't cause some or more of those other deaths? I ask not remembering the details of that early part of the comic.

Yeah, like getting into a romantic relationship or marrying her would totally be fucking things up.

MC better stay out of a romantic relationship with her!

I wonder what you said.

You hate the king that much? Well he is a pretty evil bastard on that thrown protecting power at the price of innocent lives.

She hasn't even known MC her whole life, not that she knows she doesn't know. MC has known her for what, a few days or something? A few weeks at most.

MC is in a weird situation where death is potentially around every corner and at the end if MC manages to live, MC gets to go back to reality or something.

It makes zero sense for MC to marry her. I'd be more inclined to "riot" if MC did get into a romantic relationship or marry her.