HA yea there are no last names in the game, because they do NOT HAVE ANY probably. They're not meant to, or Sqaure was just lazy and didnt want their characters to be pulled apart that much. BUT, in all seriousness, Keyheart is a terrible idea. Angelwill is...not so bad. Could do better. Soulwielder? None of these characters parents would be named this, or else they all would have the exact same personalities and stigmas as their children. DUH! My best answer is if u have a storyline idea, adding in last names now would only be a lame attempt. keep to the originals, and its all gonna sound a lot better. i know any name that i would come up with would be totally lame too, so im not making fun or anything. this is probably why square didnt do it in the ffirst place.