imma be real
21 year olds are not that much more mature er than 14 year olds
Ehhh gotta disagree there. I've been around both in the past few years. I'm a fair amount older than either.
14 year olds are literal children and that's the only way you can treat them. I have a couple of family members around this age. Well a bit older by this point...damn time keeps moving.
21 year olds are in a vague "young adult" state where it's simple to talk to them like adults but they'll be childishly ignorant about topics here and there. Still pretty much an adult by any measure. I've had a few kids around this age work for me during the summer for the past several years.
While that's certainly true, 14yo/s are def not anywhere near on the same level as 21yo/s, it is worth remembering what a big influence trauma can have in regards to stunted emotional maturity.
Of course that is to say, even with all that in mind we shouldn't wave off Koto's role in all this. In the end she's still the adult in this relationship and in a position of power over Aya as her de facto guardian, which automatically makes it her responsibility to act like it. Whether she's emotionally equipped to or not.