It's a boy or a girl?

This is the most amazing Graf Zeppelin cosplay ever made by 枣糕-下野病弃疗. It's like Graf came out from the game to reality, but my question here is: it's a boy or a girl?
Link to see more pictures of him/her (please tell me it's girl.Traps could be anyone else, but not Graf Zeppelin, not her. T_T)
https://www.sankakucomplex.com/2018/06/30/buxom-graf-zeppelin-cosplay-takes-charge/