It’s an interesting exercise to take a character from the setting they originally existed in and to insert them into one that’s entirely new and different. By which I don’t mean just taking Aragorn, son of Arathorn and putting him on the bridge of the starship Enterprise (which… actually, no. That would be terrible. I think he’d fare better on Tatooine instead.) But rather, imagining what he would be like if the character that is Aragorn had always existed in some other world.
The move isn’t always smooth. In good writing as in real life, the setting informs the characters and makes them who they are. And moving a character that started their life as (more or less) a Redwall fan character, turning them human, and dropping them into a world that is not ruled by constant skirmishes between woodlander and vermin means that you have to find the core of their character and figure out a way to keep it intact while changing everything else.
Some characters come out on the other side better than others.
But if it does nothing else, it will absolutely force you to look at them from another angle. And maybe that’s enough to knock loose some of the tropes and cliches you’ve been relying on without thinking about them, and if it can do that, then maybe you’ll find out something new about them and, in the process, discover a way to make them an even better character. Either way, it has the potential to be a very enjoyable process.