!!Using this topic to not clutter!!

I am in love with the game but i am not very happy with the origin characters neither not being able to customize the natural skills (source skills?), i find them pretty meh to tell the truth, so i ask, is it possible for me, for exemple, make it so the red prince has corpse eater? Or sebille is a skeleton (with all the proper changes, including body/clothing)? If yes, where i can read up on it to see how to do it? (dont point me to the wiki, its useless at the moment)