The main character was drawn as someone who has puppy characteristics who obey her master, but I think she's just a very, very naive character. In many other isekai or reincarnation stories with the main-character-turned-into-a-nobility theme, they need to be able to read the situation, and being strategic and political when they go into public events, even if eventually they found earnest love and friendship. And it's understandable, since the elite gatherings are always political, even in real life.
She was really lucky that she has the royal family backing her up. If not, I bet she will be ended up the same in the real world.
I can't say I like this purely naive main character. Not to mention, she was liked by the princes and nobility because she has the scent she got from accidentally taking a bath in a fragrant made by the ex-royal apothecary (It was said that the cats like that kind of scent). I honestly wonder how the story will turned out if the apothecary managed to make a potion to return her original scent.
She's kind, honest, earnest, and those are her positive traits. But as a main character of this kind of story, she's just purely naive. Without the royal family backing her up, and without the scent she got from the potion, she will not survive.
Despite that, I give it a 7. This story reminds me a little bit of The Cat Returns from Ghibli. (Could it be the author was inspired by the movie?) It's one of my favorite movie from Ghibli. The main character is too naive, but she is also too kind, so I still hope she will have a happy ending (which, looking from the title, it will happen eventually).