This could be done, though each character would require a mod of their own, and assuming you want both people to choose, that's a lot of mods to make. For example, lets say we decide to make 10 characters, that's going to require a mod where each of those 10 characters goes against another one of the 10 characters, in other words, you'd need !10 mods, which is a lot of work.

But yeah sure, if you want 2 (maybe 3) I'll try. Though do note, I mostly make weapon mods, so I won't be the best guy for the job.