Anime tomboys often push against the idea that femininity requires being gentle, demure, or obsessed with romance. They're usually shown being physically strong, competitive, and not afraid to get into a fight, which directly clashes with the 'ideal lady' trope you see in a lot of older media. It's refreshing because they prioritize their own goals—becoming the best fighter, protecting their friends, mastering a craft—over fitting into a societal box.
Where I think it gets tricky, though, is that a lot of these characters still end up being 'softened' by the narrative, especially if there's a male lead involved. Their tomboyishness becomes a cute quirk that gets tempered by eventual romantic feelings, which can feel like a bit of a betrayal of the initial challenge they presented. It's like the story can't fully commit to a woman who stays rough around the edges forever, which is a shame. I'd love to see more series where that abrasive, fiercely independent energy is the endpoint, not just a phase.
Still, even with that caveat, characters like Revy from 'Black Lagoon' or Saber from 'Fate/stay night' (in her knightly role) offer a kind of agency and power that feels more authentic than a lot of passive heroines. They define strength on their own terms, even if the world around them sometimes tries to pigeonhole them.