Good night, brother. How to write in Korean?

First of all, it is very important whether the speaker is male or female, because the word "brother" used by men and women in Korean is different.

If a boy says this, right? ,

If a girl says this sentence, what is it? ,

In addition, if the relationship is close, or the peers, you don't need honorifics.

You can say boys:? , ? ~ girl:? ~?

If there is anything you don't understand, please ask.