Sai (Earth-27)

"I am Sai, the Ultimate life form, born to satisfy and please others. But I make my own destiny from now on."

- - Sai Sai is a Human/Flood hybrid and rival of Goku, created with the intent to be the ultimate life form by Professor Isaac Gero with the aid of the Flood's leader Zetsu, who gave Gero his own DNA in order to create Project SAI (Superior Artificial Intelligence). Sai's purpose, at least by Professor Isaac, was to create a cure for a incurable and deadly disease which afflicted his granddaughter Alice, however, his real intent, by Zetsu, was that he could retrieve for the Flood the seven Infinity Stones fifty years in the future, and allow the Flood's homeworld of High Charity to invade Earth so they could consume it. Before Isaac's plan could be set in motion, however, Sai was captured and locked into Ryker's Island by S.H.I.E.L.D., whom also killed Alice and emprisioned Isaac in the process.

Fifty years later, Sai was freed by Dr. Ivanoff Gero in order to aid him in his plans of world domination. In the beggining, Sai choose to aid Gero in order to destroy Earth and avenge the death of Alice, but was convinced not to do so by Goku in order to help him save the planet from Professor Isaac's revenge against the world. After seemingly killing himself to save Earth from Isaac's Giratina, Sai lost his memory and sought to discover the truth about his past, during which he entered in the contact of the Flood and Zetsu. Ultimately, Sai fought against Zetsu to save Earth once more, putting an end to his fifty year plan and his cursed past. From this time onwards, Sai sought to help others by joining S.H.I.E.L.D. in the orders of Nick Fury. Two years later, his image would be used by Madara the Dark as a avatar for his evil plans.