I feel you. The fact that Ria is acting as a child sometime.. I can understand it, she has to put a "show" for the other. But right now, I have the feeling that the fact that she was an adult before does not matter anymore.
Like, in the last chapter, as an adult, she may understand that she's the only child of the emperor that has being reconized and that people may want to harm her because of that or gain power through her. What's best than sending a child to make a connection with her then ?
Yet, she yelled that "she hates her dad" and run away... come on ! It's not like she can't think about that...
she grew up and was treated as a child i think she just got used to it and began acting like a child, it depends on the environment she around i guess
i like this webtoon and everything but the fact that ria is not a child and acts like one really gets to me lol idk why and the fact that ria hasnt grown much unlike the other kids in the webtoons i be reading