The thing that (typically) sets the Dark Knight apart from the rest is its ability to corrupt. Other roles are simply practiced, but Dark Magic is (again, I say typically since I'm addressing the usual trope) depicted as an almost living entity. It makes the user do things; it changes them. That conflict and how the 'host' deals with it is what makes it so interesting.
First, address Steel's identity beforehand. Is she ambitious? Is she 'good'? What would be her 'price': the thing she wants / state she'd get to where she would abandon her beliefs? This price doesn't necessarily have to even be a prize; flip it around and it could be a breaking point at which she simply stops caring. Second, why is she interested in this? Dark Magic comes with a warning label, so what would get her to even consider it? Is it a means to an end? Is that end selfish or pure-hearted?
From what I can glean from Steel, she'd need a pretty good reason to resort to the Dark Knight trope, but honestly that can make the fall all the more poignant  if you can pull it off. My Garlean isn't a Dark Knight, but she does some pretty nasty things for the sake of an ideal she wholeheartedly believes in. She's not evil, but she realizes achieving her end requires getting her hands dirty.
First, address Steel's identity beforehand. Is she ambitious? Is she 'good'? What would be her 'price': the thing she wants / state she'd get to where she would abandon her beliefs? This price doesn't necessarily have to even be a prize; flip it around and it could be a breaking point at which she simply stops caring. Second, why is she interested in this? Dark Magic comes with a warning label, so what would get her to even consider it? Is it a means to an end? Is that end selfish or pure-hearted?
From what I can glean from Steel, she'd need a pretty good reason to resort to the Dark Knight trope, but honestly that can make the fall all the more poignant  if you can pull it off. My Garlean isn't a Dark Knight, but she does some pretty nasty things for the sake of an ideal she wholeheartedly believes in. She's not evil, but she realizes achieving her end requires getting her hands dirty.
