For what its worth I don't forsee Shara doing the final blow. If you followed WC, Vedau taught Shara that the best, THE ABSOLUTE BEST that she could do, is survive. I believe that only Mitsu can kill Kokujin, Shara can do her best to stop whatever plans Kokujin has but thats about it. Of course we'll know what happens at GC.
Crab Clan*Berserker*Angry Crab
Hida Shara @ WC
Hida Reiha @ '09/'10 WCII
Kuni Renyu @ '12/13 WCIII
"Many stories will be told of what all we did here. We have not and will not make everyone happy. What do we care?! Let the masses tell whatever tales they wish of how we handled things, we have our duty that we perform to govern and live as we must. We know the truth. Let everyone else be a damned lie..." - Kuni Renyu