Female reenactors as soldiers?

[M. Demetrius]

Gauls, and other "Celts" had female warriors in the ranks. Romans, of course, didn't. But each group has the authority to determine what is acceptable in their activities. As said below, the problem arises once two or more groups are together for some event. We all have to remember that we are not really Romans, but reenactors, at some level or another. I can't make the decision for any group except my own, and even then, it's a matter of considerable thought and discussion, isn't it?

which of these are female

The one on the left?