Well, sixth sense usually tells what your detecting. Magic sense would detect magic and what type of magic is used if you have knowlegde about such matters. As my sixth sense is generic which just says 'creatures of darkness' I assume I can try a difficult roll to determine what type of creature of darkness I am sensing.<br/><br/>So I would sense first in longer range your half-creature of darkness but I cannot say anything more. But closer range I can ID location and also the type even from weak source with Soul roll. So I can tell your sister is half-demon (or half-succubus specifically).