Cuz it seems it's a more boy/man type character dominated category, what are some girls or woman who are underdogs and you found fun.

In a sense, Ochako Uraraka "Uravity" from MHA turns into the underdog of the "main" cast being a school girl training to be superheroine with gravity powers, which while yes are normally a busted ass type of power, because of her specific tactile and precision restraints for it, has to work super hard to use it properly.

Instead has to mostly rely on MMA-style martial arts from a gun named "Gun"(a name that's apparently more popular than I thought?) to the point that in her final fight she almost lost the proper fight trying to reach out to the villainess ninja girl with a copy/shapeshifting ability that also has some heavy restraints, but her words do actually reach that girl, making her save her life but dying in the process, turning an almost loss into an almost Ace that scars her for life

Also the horse girl, which in-universe are called Umas, from the anime Cinderella Grey.

Obey Your Master(who is based on a real horse they couldn't quite get the rights for? Pay the Butler, heh), who basically completely changed her attitude, training regime, lifestyle, studies her competition, their quirks, abilites and gave it all to win a singular race, the Japan Cup, basically shown as the role of the mastermind where she was sure she could win this one , but in truth being more of the underdog facing off against the lightning-like Tamamo & Oguri, the muscle powered rough play of Michelle Bay, the extreme racing experience of Toni Bianca & Ellerslie Pride(all based on real horse with seemingly pretty prestigious racing careers) after all that she does it and that's her one big win, an impossible and irreplicable victory for her