Harry Potter and the Horcrux Soul

Horcruxes are taboo in the magical world, but...why? Why should it only be cast upon inanimate objects? Nobody knows much about them, what if there's more to them than they appear? What if living horcruxes are much more different than inanimate ones? Tomarry. WolfStar Creature!Harry. Sane!TomRiddle. Heavy AU. Soulmateverse.