SAVE - Charisk
When the battle was finally over, Frisk broke the barrier, and the one last soul was saved, Frisk managed to bring back Asriels soul to his old body, humans and monsters finally lived in peace. Frisk became the ambassador of the monsters, it all worked out perfectly well.
But little did they know that, someone was watching them fight, or to be exact, mercy all of the monsters. They were so thrilled by Frisks determination, their will to live came back, and their soul finally collided with their dead, cold body.
Chara was finally brought back to life, by no one other than Frisk himself.