As the original and immortal force of shadows, Shada Kira will never completely die. For shadows to exist so too must she, and by this point shadows have become a critical link in the chain of karmic management. Without them negative energy would overflow and taint the other karmic powers such as creation and creativity. She can be “destroyed” and be forced back to her original, weak state, but not completely eliminated from this world. For more see her page in the Characters tab.