Wait. WHy is she now dumb and oblivious? The author seems to have just given up and now her mental age just retarded to teenage!?
I have a theory about that actually. I think what happened is that even though she is a reincarnator, her mind had been influenced by the body that she currently have. I don't know how to term it exactly, but maybe "it's just hormones" will do. And as for her denseness, all her 2nd life, she's been filled with love and adoration from the people around her as the princess. She's grown used to it to the point that it's hard for her to discern who actually LOVES her romantically and those who just likes her as Ria. I mean, the blue haired twin LOVES her (I think) but she doesn't even realize that.
I actually really agree with you, even when she was younger like early years she never thought or acted like a person who had 25 years of life experience. I understand having to act dumb to other on the outside but even her thought processes, ideas and internal dialogue were not that of 25 year old! I wish she had used this second life as an opportunity to power-up and not die a miserable death like her last life? ALSO when she learns of magic and magic items she's not in the least bit surprised, curious or interested?? But like?? its magic??
Where has this development come from. Now all of a sudden jealousy!?? Really? Wishy washy please don't go down this route.
The signs are small, but they’re there. Like I’m chap 27 she has the “badum” sound when the emperor kisses her hand. There was also when they were trying clothes and the fact that the empower said something that he would have said to then org mc, mc hasn’t verbalized it and isn’t quite aware of it yet, but she is falling for the emperor.