-Join the Legion as a woman. The men do a really bad job at selling their ideals to the opposite six. I would probably only do it if I made a really stupid female character, with like, an Intelligence of 1. But that's assuming her stupidity doesn't eventually alienate her from the Legion over the course of the game.
Ohh, that's the only way I've done it!
I think the Legion are quite cool - I like the roman aesthetic quite a lot - but I don't respect them for a second, so I really like the idea that on my console, the only time they've ever been anything but brutally slaughtered at Hoover Dam was when they employed a woman to do their dirty work. That's good. Undermines the very bigotry they were founded on. Very subversive.
Just finished my first Legion play through, courier called Cleo - seemed apposite! Female courier forces them to question every fibre of their existence simply by virtue of existing, which I think is wonderful. A male character would risk having to go with the flow. No matter how much he disagreed with their principles, he's not head of the Legion, and would inevitably occasionally have to follow orders else. A female character would not. A female legionary would never have to take those orders, as it would be point-blank impossible for Caesar to make a coherent argument for the subjugation of women while staring into the eyes of a lady who is one of his most important agents and could have killed him ten times over by now.
A female courier would be a mountain of evidence prodding them in the face whenever they read that page in the history book. Best chance at a strong-but-
civilised wasteland. As in, sans-bigotry. Not the nonsense Caesar's peddling as a civilisation.