Like Impa, Fi, Groose, or Gaebora...
I'm all for Demise, but "_Data_Drain_" has a point. I say let DSX8 release Ghirahim over Marth, and then make SS Zelda, SS Link, and Fi. Then DSX8 can make Impa, Groose, Geabora, and when a lot of time passes, DSX8 can release Demise...