this might be typical but it isn't a rule.
also typical but not a rule. I know many girls who prefer to use the looks they think best for the job they play. For instance a kunoichi(female ninja) has many ways to dress but often uses sex appeal or sexy dress as distraction so a skimpy dressed female ninja would not be unheard of even if played by a female.
I know quite a few guys who are OCD about their looks
also many girls who are OCD about completing gear sets.
so sorry honestly the best way is to ask and hope they are honest. but really what does it matter unless you are actually going to meet them?
also I giggled lots at this :D
