also the mom might make a "wish" that she comes back and since "hikaru" is right there he might use the piece of his soul that yoshiki has to make the girl come back to life so now we have two little homonculus running around the town
also the mom might make a "wish" that she comes back and since "hikaru" is right there he might use the piece of his soul that yoshiki has to make the girl come back to life so now we have two little homonculus... girl 2
i hope the fact that Hikaru divided himself will save the situation (he at least once told that he cant kill after that)