Now I see that @Xora is right: there is no pure wight and or absolute black. All Heroes at some point of their journey are tempted by the simple solution, which can be seen as the fall onto the Dark Side of the Force. On this point I want to stop, and to look onto StarCraft 2 trilogy. It's not only the RTS game. It's also a tale, not a fairy tale, but a real tale about the universe, where is no black and white. There is only some shadows of gray. I know by the heart, that we can derive from here something meaningful.
For people, who do not know the story: in previous part, Sarah Kerrigan was captured by Zerg and turned into the Queen of the Blades -- the ruthless killer. In the first part of SC2 trilogy, it's James Raynor, who is The Hero. He is willing to do anything to save humankind from the Queen of the Blades, and when he got a hope to return Sarah from the Dark Side, he is going all in to do so. And he succeeds.
Second part, The Heat of The Swarm, is the most important to me. Sarah is no longer one of the Zerg, but when she hears heartbeaking news, she goes again to the Dark Side.
Or so she thinks. Later, it was reveled that what she has done is the one and only way to do the things right. Sarah is on her quest for vengeance, she is Zerg again, but also she struggles not to lose her human part. Her struggles about dual human-zerg nature, even if they are shown briefly in the game (lots more in fanfics!) are not unfamiliar to some non-binary people (including me).
At some point, it's her human part, which shines when she deals with Zegrs. Other times, her human friends must remind her about consequences of acting in "efficient" ways. It's friends, who are fighting for Sarah, and Sarah, who fights for Jim.
It was so easy to Sarah to fall into the dark despair or ruthless vengeance, without this zergling.
"You are not from my brood. You are not even a proper Zerg, as I can see. But I can't allow you to howl here alone. I'm with you, improper Zerg. You are not alone"
It's a pattern, so common in different tales, it's really compassion and friends, which makes our hero not a fallen one, but The Hero. StarCraft brings it on the surface -- Jim can never be so strong without Matthew, Matthew without Jim can do nothing, Zeratul alone with his knowledge can't do anything, and without Zeratul's prophecies, told to Jim, Sarah and other people there is no hope for all races. Even without cooperation with pirates, at some point, nothing can be done.
Also, there is no clear-cut outcome of your actions. You may think that you are doing the right thing, but you are horribly wrong, like Emperor Mengsk. You may be torn by the two opposite forces, like Tychus, and in the end ... (this is another tale). Or you may go onto the Dark Side, only seeing later, that there was the only right way... This is our human nature, this is our blessing and curse.
Going back to transgender journey, if it's a journey of the Hero, it's so important to note, nobody never should howl alone.