naw im YA and i look vaguely like one of these people so it is very possible to look like that as YA
as for story well that might be bit more puzzling but i tend to age my sims based on looks rather than the "they'd be this age realistically" factor cause i have quite few vampires and other occults with mysterious immortal ages in midst
i just like to think they look young for their age so people see them as ya though their age be whatever
funnily enough this leads to some funny stuff like vlad being judith wards "young boytoy husband" even though it looks the opposite :lol: