Quote Originally Posted by NeoCybercoin
I would like to know more about the fact that Xing and the other's can "sense" homunculus.
It seemed like Ran Fan and whatshisface could tell that Gluttony had many "lives" within him. Perhaps they are sensing something like ki?

If so, they could tell that Gluttony had consumed a number of people, and thus know by that sensation that he or someone like him is nearby.