[@Homosaxophone] I'm not really a fan of 'curses' in general since it tends to tends to give characters a special backstory that likely won't be resolved or even useful in the grand scheme of things. I'm almost aiming for fairy normal human characters since bringing in other races is opening a massive can of worms, so to speak. I would greatly advice against basing your character around a curse, but if you are that inclined, I would say to stick to a humanoid and to downplay the curse as much as possible since I'm assuming they're a victim of some wrongful attack OR they deserve the curse and if the latter is the case, they probably would have been left to die since these aliens save those with kind souls. XD

Thanks for running it by me, but I'd probably find a way to spin the curse a unique way that doesn't 'consume' the character's identity (both mentally and physically) and allows them to not let it define them. If that makes sense.