I think rather than it making the other 'look' older, it's more that physically most child MC's are usually around 8-10 years old, older than Thie, but I think given the regression/transmigration these characters go from being physically adults/teens for example and they retain that mature outlook on life, whereas for Thie, she was regressed at 4 years old (I think) and so she's actually acting her age, while being this incredibly strong and emotionally intelligent child, who's still missing her dad and isn't scared to cry about it.
Sorry if this doesn't make sense haha.
No no I get what you mean, but unfortunately some manhwas (which I won't mentioned) just simply have the art style where they made the kid mc looking like an adult despite them being an actual kid I'm still reading them ofc, it just sometimes threw me off when the art makes a kid doesn't look like one
Oh, I guess for some I can see what you mean haha
Can we give a minute of appreciation on how they actually makes thie looking like an ACTUAL child? Cuz some manhwas nowadays make them looked like an adult