Something in japanese I don't understand
 

Hello everyone. Could someone tell me what 良い女の子である means? I'm not sure if its rude... :confused: Sorry if it is. Thank you all :)

良い女の子である

いい　おんな　の　こ　である
good girl to be

Or something.

gorotsuki's break down is correct. just put it into a normal sentence =
you are/she is(no specific subject) a good girl.

yoi onna no ko de aru.
Isn't である a very polite form of です？ If that's true, then this phrase is very very polite. It's like "Good girl!"

Maybe more polite thers more polite ways then that.

dearu is a literary/explanation-like expression. it is formal but not polite. and it is hardly used in daily conversation.