In the novel it's stated that Aria grows up very quick to the point while she was grieving (i forgot why), she stayed in her room for so long that when she finally got up, even her maids were shocked that she's suddenly tall. So i think the artist had to make every character matched Aria in terms of age appearance.
Oh, is that so? I guess its not going to explain in this manhua?
It's not clearly explained in the manhwa either. It only says that Aria grows tall and fast that she already looks like a grown woman... so it's easier for her to gain respect despite her age. But there's a speculation that every time Aria uses the hourglass, her body grows faster.
Sorry. I mean it's not clearly explained in the novel either
Okkk understood(๑•ㅂ•)و✧
When did they grow up??? If you realized the artstyle changed a little bit to mature the character huwaa I am not ready （/TДT)/
Well they are in teen years after all ╥﹏╥