Ylgrin, the Wandering Wolf

Basically, it's a transwoman IceWing named Ylgrin (Old Norse for She-Wolf), who was displaced from her kingdom because her father got mixed up in nobility IceWing politics and ended up getting banished (what her father tells her) and wanting to raise an army to come back and raid the kingdom and usurp the current regime.
And she's had to live with a father and primarily IceWing group who are... well, kind of conservatives (but kind of tricky in that regard, because they're displaced from their "home", meaning they can't help but seep a few less-traditional values out of pragmatism and need for higher numbers to take back their home because IceWing hypocrisy).
Meaning, she's had to live with the fact that the gender politics of the Ice Kingdom kind of... screwed with her. Because she thought being a dragoness was a symbol of being strong and free and she wanted to project that strength and viscerally feel strong and in a body and mind that was comfortable with itself... and a good chunk of IceWings kind of humored her or looked in disgust at her for trying to be the leader's daughter rather than his son. Because that's not how it works, Ylgrin (at the time Ulgrin).
And her father certainly humored her and tried to give enough leeway to ask his gang/growing invasion army to treat her as the leader's heir (because he only had her and no biological dragonesses and had to compromise traditional IceWing values a bit), but... Ylgrin has some mixed feelings on her father. Because, later, she knows he would've treated anyone else in her position like shit.
Not even just out of sexism and queasy gender politics, out of sheer classism bigotry.

Then, her father dies out of sickness.
No noble/glorious end in battle for him.
Just an ignoble death, suffering from sickness.
And, well, Ylgrin ends up being very afraid. Because she never expected a time where she had to be the leader. She just wanted to go home. The home she never experienced for real. The one her father talked about how she'd be the new king and queen's heir and inherit all the kingdom once they're done.
Ylgrin even dislikes going on raids that her father unleashed onto non-Ice Kingdom towns and stealing and killing random dragons for supplies. She just wants a place to be at peace and happy instead of constantly having to fight.
But... she has to be strong. She fels she has to be responsible, be dutiful to her father's dragons. Because they were promised the same home her father promised her. She has to be their strength.

So the moment her father dies, the higher-ups of her father's gang gather around to argue and discuss who'll be the next leader.
Because some of them aren't particularly fond of letting "Ulgrin" take the reins of leadership.
Because they've noticed that she's not entirely got her father's devotion to traditionalism, nor his drive to kill non-IceWings.
Plus, she's like 7. Barely a dragonet. And a "lesser" gender to boot.
So she marches into where the higher-ups are discussing things and tells them straight-up, "You have an successor. She stands before you, the last wolf."
And when one of them mouths off to her, using "Ulgrin" as a name and asking what "a weak milkblood" like "him" can offer, she approaches him, slow and cool... and knocks his legs down and grips his throat and tells him that she can offer them home... and that if he calls her by the wrong name again, she will show him how weak she is and how dead he'll be.
"It doesn't matter how strong and brave and arrogant you are, one stroke of a claw... and you'll be dead and I'll keep roaming, the last wolf upon Pyrrhia."
And there's a part of her that's not okay with threatening others, not at heart... but a greater part of her knows, in order to make tracks, she has to exercise hard power. You don't get anything done with just pleases and thanks yous.
So she turns to the others and demands if they have any complaints. No one wants to cross her, despite her being smaller and weaker than the adults, because she's already made a show of her credibility.
"Then it's settled. Leader Ylgrin, we follow you on your hunts from now on."

And after that... she's still scared. Very anxious about screwing things up, very paranoid about appearing weak and too un-IceWing, very afraid of not being taken seriously enough by anyone on account of her trans nature, having to keep putting up an act of being a fiercer leader than her father is...
Trying to be the perfect IceWing to them.
But. She's not that. Not at heart. And there's a running question about whether the "perfect IceWing" is worth striving for, whether it's worth it to your soul, and whether it's even possible... or even wanted in a new Pyrrhia.
Because, to her, the "perfect IceWing" is violent, arrogant, always believes in themselves, proud, abrasive, never forgiving, and always victorious and poised.
And... she's not really any of those things at all.
And there's something that the more Ylgrin thinks about how much her father's raising her, the more she realizes 1. Her father's actually a big piece of shit who would've institutionalized kingdom-wide anti-LGBT+, unflinching classism, and in-the-dark assassinating of problematic figures that threaten the status quo without blinking an eye, and 2. the Ice Kingdom would've fucking torn her apart and probably killed her in the shadows for being what they'd consider a progressive.
So, her motive for invading the Ice Kingdom gets more nuance: originally, she wanted to invade the Ice Kingdom because it was her duty and she thought her father's banishment was a wrong one... but now, she wants to invade it because she thinks the government won't change without overhauling the entire apparatus and disenfranchising and/or culling the crueler nobility.

So she becomes an Alexander the Great conquerer who can out-play most of the IceWing military minds in terms or tactics easily. Because she's the underdog to the great Ice Kingdom's great masses of sharpened icicles and she has to adapt or die.
But... it's not entirely simple.
Because there are a few characters already trying to change things through knives in the dark (just directed at asshole nobles) and peaceful reform and societal changes, damn the nobility support.
And Ylgrin wants all of the Ice Kingdom government to kneel before her and won't spare those who are doing what she wants, just on the other side.
And Ylgrin's legit done some terrible things, been culpable in raids and town sacks that she committed because she needed resources.
But she's also institutionalized a lot of good changes with her post-father term as bandit leader. So much so that even some of the less conservative minds in the gang say they're happier being with Ylgrin than her father and whereas they'd take a blade for him out of loyalty to a leader and having no other choices... they'd take a blade for her because they like her as a person and give her mad respect and want to fight for her dream.
She's afraid of most of her gang because she thinks they look down on her, but eventually, she's caught off-guard by how much what good acts she did she took for granted, some of her band actually found extraordinarily wonderful (thanks to her father being a typical IceWing douche and having the appropriate leadership) and vice-versa, with them using proper pronouns for her and meaning it.

So there's an uneasy sympathy with Ylgrin. Because she's sympathetic. She's a likeable and gentle character... but, she's been complicit in hurting or being part of non-IceWing deaths. And, yes, some of that was from her father's term as bandit leader, but some of them definitely happens during her term too. And there's a question of how much a warlord, even a very determinedly progressive one, can change the world with blood and steel before too many corpses are piled up for that dream.
And that's not to say the Ice Kingdom's innocent. My story gives a ton of validity to Ylgrin having very valid points about how much the current Ice Kingdom system is toxic and demands compromises from the nobility in order for the commonfolk not to consider joining up with Ylgrin (and even some nobles look at Ylgrin and see a "true queen"). The current status quo of relying on nobility support without power checks can't go on.
But if the queen and her heir are willing to compromise... if political pressures and lower class tensions can push the nobility to caving in, does it have to end in blood? Does Ylgrin have to kill a lot of dragons to build up that better kingdom?
And there's also the fact that the other main characters of this story hold a great deal of sympathy for Ylgrin and really don't want her to die. Not just because she's a revolutionary who's got very valid points, but the fact that she has to answer for what she'd done to a decent amount of kingdoms' towns.