Is it possible for a Female Character to side with them during the main quest or does Legions's Philosophy on Women prevent that from happening.
Are you serious?
I think they have to allow it, no matter how much Caesars Legion wants to stick to Caesars Philosophy from centuries ago.
And if you want to take it more seriously, I think the game would be on the news, and a law suit quickly pursued due to female rights, and they would file a lawsuit because the person was offended...
To avoid that, and every other concern, and to appeal to the gamer who buys the game, they must, in fact, allow a Female made character to enter into Caesars Legion...
Obviously.