And she looks like a man.
Look. I get where you’re coming from. And this could all just be from me and my personal issues. But I just... there has to be something there. It is fiction at the end of the day.
Also, no way Metroid is hard sci-fi. It has psycopathic murder dragons, shapeshifting parasites, and alien cryomancers.
I used the term "relatively hard sci-fi." When the series you're comparing it to is Bayonetta... it's pretty damn hard.
You think Brienne looks like a man because femininity is not designed with practicality in mind in real life. It doesn't allow for women to be physically active. Society has coded masculinity as the "default," especially for physical activities, when in reality it's just the
absence of feminine traits.
Here is Ibtihaj Muhammad, a famous female fencer.
Nothing she wears is expressively feminine except for the hijab which she wears for religious reasons under her helmet. She wears the standard outfit all fencers wear. Samus wears power armor that is practical in her setting.
I could go into a whole dissertation about how feminine expression is largely commodified by men who want to keep women in certain boxes, but I'll spare you of that. Point is, in a practical setting, when it comes to physical activity, feminine expression is a nonpriority.