
I mean I get where you are coming from but understand Elise a bit, she's in love with his alter ego his own fault and even as himself he hasn't really been as sweet as his other self. Worse the royal family is forcing her marriage to him which she wants no part of and worse she has her memories of het past life and fear is an irrational thing. Him lying to het isn't going to end well... He should have approached her as himself he has no one to blame but himself for her behavior.....

I mean I get where you are coming from but understand Elise a bit, she's in love with his alter ego his own fault and even as himself he hasn't really been as sweet as his other self. Worse the royal family is forcing her marriage to him which she wants no part of and worse she has her memories of her past life and fear is an irrational thing. Him lying to het isn't going to end well... He should have approached her as himself he has no one to blame but himself for her behavior.....

Yup.. i know that.. but leaving him when he came for her... i mean leaving him alone when everyone else already left.. how awkward is that for the prince? Imagine going in a party then upon your arrival one by one the guests left.. anyone would feel hurt if not offended right? With Elise's co-workers, it's understandable that they left since they are giving them time alone. Linden & Elise. Not just Linden alone. And they wouldn't have imagined that Elise herself will try to live him by himself. Even if she's wary of him, common courtesy should at least be given to him. He's the crown prince after all. And even though she doesn't want to, she's his fiance. She could at least reciprocate all the good things he's shown her when he's Linden and not Ron. She didn't have to be in love with Linden, and he didn't have to be Ron, to show a bit of care.

I don’t want to be a downer, but I think that you could sympathize with the prince because you know his side. If we only know the story on Elise’s side you’d find that the ‘kindness’ he’s showing can be interpreted differently.
Example: Linden backing her up for getting control on the battlefield hospital could be reasoned with her having enough achievements to warrant a chance to better the situation in there. It is possible for Elise to think it was merely an act of him showing respect to her skills as a doctor.
Elise’s wariness is understandable, because she doesn’t know what’s going on in his mind. With the deadline inching closer to the bet she has with the king, her worries will take priority that dealing with a man she thinks she ‘kinda’ like.

Even if Elise is wary and thinks Linden helped her due to her skills as doctor I think I have to agree with OP's comment. Elise should've shown courtesy and not leave Linden alone.
A bit of appreciation for the Crown Prince who generously chose to join her instead of celebrating with fellow soldiers.

So you are she should be thankful he chose to be with her instead of his men? I understand the viewpoint of being polite but no one asked him to be there, she was enjoying herself and having some peace after all the damn hard work she put in and he shows up and ruins it. Prince or not I wouldn't want to be around him either. No one seems to get Elise does not like the Prince, because of her past memories, his coldness towards her despite his moments of helping her which always makes it seem he benefits from it in some way or the other when he's himself and not Ron. Despite them being the same person he behaves differently as Ron as himself he's not good to Elise no matter what he as done for her it's all in the capacity of the Prince not as himself. Worse because the Emperor is forcing Elise to give her dream to marry him. If you were here would you react differently?

Her behavior aside have you though of how Elise feels in all this. As of now all I see is how you don't like how she's behaved with him and how he feels and what her actions would have done have you though how Elise has felt after the things he has done? Said or behaved towards her? I feel that its so bias to only think of how he feels. Imagine how she feels he comes barging in for his own selfish reasons ruing the atmosphere she finally allows herself to bask in for what really? A sense of duty? Pride? He's a wall to her he is standing in the way of her freedom and life. Though Elise may not hate him per say she is afraid she's just as unsettles and having the memories she has doesn't help the situation at all. Of he paid attention he would have realized or if he was thoughtful he would have left her alone. I mean I can understand you think her behavior is rude and she should be more thankful bit has any situation he has helped her with not shown him up somehow? She's wary and cautious everyone can see why can't he? Its selfish and he only started being less cold because of the time spent with her as Ron and even then his behavior was still standooffish.
Graham is actually a good match to Elise.. but of course.. the prince still wins in the end. I'm also Team Linden (▰˘◡˘▰)
I'm gonna comment on the last scene though, what's with that? Even though Elise doesn't wanna be alone with Linden, would you leave someone alone who came all the way to check on you and was worried about you?? He's only shown her good things and gave her support in situations that wasn't favorable to her and that's why it was less difficult to achieve her goals. Since he had the power to help her. Even though it was him that had her killed in her past life, only her knew about it. The present prince loves her and wouldn't do such a thing now. Her fear of him is understandable. But her obvious brushing off of the prince when showing his good will, which he never did when she asked him for help before, doesn't sit really well with me. I wish she'd at least be a bit more considerate of him since he's helped her so much already.