Not arguing with you because I don't want her to end up with either one as well, but technically Jason is their age. A guardian beast is born at the same time their masters are and die when they do. So even though he looks older Jason is their age.
Right technically you could argue that Jason is younger than them even.
kat929 reiterated my thoughts exactly. It seem that they change there looks to suit the situation but people have to remember that this is a magical world. For example second prince (long hair) looks like and adult or maybe late teens but in chapter 7 it is stated that that dude is 10 (A fact that I forgot and remembered while rereading).
https://www.mangago.me/read-manga/the_twin_siblings_new_life/uu/d_chapter-7/pg-29/
If the manga doesn't take place in the modern world at current time then you have to member that not everything will fit to modern standards and values, this is an example of that. Though I will say that in your defense that it can look weird out of context. (￣∇￣")
Yeah I always wondered how old is the emperor cause they all have these crazy growth spurts at like 5plus yrs old or something and as the emperor it was his duty to have heirs so did he become a parent at like 10yrs old or something? Is he only like 20yr old now? Age is such a strange thing in this story
It seems like their minds also age when they hit their growth spurts. So their level of cognition should match their physical appearances.
Yes I agree
Oh shoot I missed of glossed over that chapter I just remembered him being an adult and sh*t so I thought he was much older
Plus he acts mature so my bad
Right nobody would look at that chara and think he was a 5 year old
I’m sorry but not only are they older and she is A CHILD (even with the 20 years in moderns they act like and look like children) plus the dudes are hundreds of years old. They would look like grandpas if they looked their age. Like no hate rn. But pls tell me they aren’t endgame