Akebi Sanzu

Because Delta was grown straight from Akebi's genetic material, the cyborg carries a face and build almost indistinguishable from the woman who supplied them.

By Ada's account, Akebi was an ordinary woman whose temperament had nothing in common with Delta's volatile, aggressive streak.

Akebi fell victim to an incurable sickness that no one could trace to any source. After her physicians exhausted their options and abandoned the case, Amado, already familiar with cloning, decided it was wiser to grow her a fresh body than to invent a cure from nothing. She did not survive the roughly nine months her clone needed to mature.

Undaunted by her death, Amado had kept her brain intact and copied her memories into digital storage as a backup. Yet when that data was loaded into the new body, the resulting clone held every memory while behaving like a stranger, a wholly separate person. He rebuilt her repeatedly without ever recovering who she had been, and the failures finally broke him. Those clones came to be known as Delta. It was in that despair that Jigen offered him a place in Kara, dangling the promise of a reunion with his child.

Later, once Amado grasped that Isshiki Otsutsuki meant to erase all life and render any revival pointless, he turned against that plan instead. His study of the Otsutsuki taught him that the Kama could rebuild a personality in exactly the way he never could, so when he repaired Kawaki's Kama after Isshiki's soul was gone, he quietly seeded it with Akebi's data, betting that Kawaki would one day place the mark on a clone and finally bring her back.