I mean, they´re 18 physically, but they´re still foals mentally.
So yeah, it´s complicated.
But people have the same issue with Raphtalia from Rising of the Shield Hero.
Anyway, great pic as always.
Season 9 they used a wish flower and they turned 18 -_- then they were asked to turn back to fillies BUT FOR SOME REASON TWILIGHT CALLED THEM FOALS so yeah then in the last ep of all of MLP it was 20 years later then starlight takes over the whole friendship school plus the CMC are grown ups and their teaching at the school thats it thats when they grown up in both eps