Voldemort, knowingly, created 6 Horcruxes.
Of these, each seemed to resemble some part of the body.
- The Diary seems to have a brain of its own. It is the only non-living Horcrux that seems to be capable of independent thought and action, and even memories (It remembers whatever Ginny writes)
The Locket resembles a heart, and Ron even feels so the first time he touches the locket.
He handed the locket back to Ron and Hermione, each of whom did their best, but were no more successful at opening it than he had been.
“Can you feel it, though?” Ron asked in a hushed voice, as he held it tight in his clenched fist.
“What d’you mean?”Ron passed the Horcrux to Harry. After a moment or two, Harry thought he knew what Ron meant. Was it his own blood pulsing through his veins that he could feel, or was it something beating inside the locket, like a tiny metal heart?
- The diadem bled as it was destroyed in the Fiendfyre.
A bloodlike substance, dark and tarry, seemed to be leaking from the diadem. Suddenly Harry felt the thing vibrate violently, then break apart in his hands.
The Ring, and Nagini, don't add any sense to this theory. The cup was destroyed off-pages by Hermione, and nobody talks about it much, except to say Harry would look stupid with it hanging off his neck.
Are there any indications of the other Horcruxes exhibiting such behaviour, like they represent a particular body part? Or is it just coincidence?