I wonder if they'll ever show the ~How~(tm) she matured, even if at least bits and scenes, cause I'm digging where this is going, but... I think its really easy for the author to say "now she's ruthless" after a time skip.
Cause the princess we knew wouldn't mind, or even invite inside Dowun (even if I don't like yet that guy, is what previous princess would've done I guess). Now she's distant to anyone and everything, and tis okay but...damn girl what did you live how did you end up like this..