YOU SAID:

I'm gonna make a 13 year old girl with a few people who are

INTO JAPANESE

何人かの人々と13歳の女の子を作るつもりです

BACK INTO ENGLISH

I'm going to make a 13 year old girl with some people

INTO JAPANESE

何人かで13歳の女の子を作ります

BACK INTO ENGLISH

Several people will create a 13-year-old girl.

INTO JAPANESE

何人かで13歳の女の子を作ります。

BACK INTO ENGLISH

Several people will create a 13-year-old girl.