Being a JRPG fan, I can’t help but bring up two related examples your resident gamer girl left out, that would advance the overall conversation…
Rydia (Final Fantasy IV) - Originally found as a little (powerful) child, and swallowed by The Lord of the Sea, Leviathan, she becomes the go-to girl for powerful summon spirits and black magic. Her only real drawback is her fakeout death (spoiler alert, by the way.) In every way, she’s a competent, powerful girl, then woman, who helps Cecil to save the world. It’s also cute the way Edge has a crush on her (subsequent spoiler alert. I’m on a roll tonight!) Her outfit is perfectly suited for the fact that the Feymarch is somewhat ‘underneath’ the underworld, which has lava currents (in this case, the stripperific outfit is ‘barely’ justified.)
Harley (Final Fantasy IV: The After Years): Harley is the Royal Secretary to King Edward (yes, his death is a fakeout too, spoiler spree!) who helps run the Kingdom of Damcyan in the years after Final Fantasy IV. In the final few tales, she winds up accompanying the party to the final dungeon. She’s somewhat the antithesis of Rydia, though - where Rydia is insanely powerful, while lovable, Harley is most useful for her Gil Toss command, which has potential to deal some crazy damage, at the cost of money. However, she gets a temporary Damsel state in Edward’s Tale (spoiler, yeah, yeah. Final Fantasy IV: The Complete Collection is a good game, go buy it so I can stop ruining plot lines!) Has a conservative outfit, and in Edward’s Tale you can find out that she went to school in Troia to study and become the powerful, intelligent, and crazy-skilled woman she is.
These are two powerful women who have things happen in the course of the games they take part in, yet aren’t marginalized; Rydia encourages and pushes the party forward both emotionally and literally with her overpowered Black Magic and Summoning kit, while overcoming having her village burned to the ground (and, traveling with the guys who did it), while Harley provides a well-fleshed-out supporting character whose usefulness trails off late game due to a significantly less than useful kit and item draw.
My challenge to The Gamer Girl: create a campaign for Harley that draws on her background and allows her to be a leading lady without marginalizing her. While she’s obviously intended as a support character, she could be more. In the context of the Final Fantasy IV systems, consider her item draw, combat abilities, and backstory.
I think this would help The Gamer Girl to further her research, and in the same fell swoop provide a source inspiration for a more ‘hands-on’ approach with leading female characters.