Erros Palpatine

Erros Palpatine, later known as Erros Kallar, was the cloned "son," a bioengineered strandcast, of Darth Sidious—the human male Sith Lord who ruled the galaxy as Galactic Emperor. He was created by scientists on Byss, where Sidious experimented with his genetic template in order to create a stable host for his essence. However, unlike later clone bodies created for the Emperor's use, Erros lacked his progenitor's connection to the Force and, due to having developed an independent consciousness, was deemed a failed experiment. Nevertheless, Sidious permitted the strandcast to live as a means for continuing the Palpatine bloodline.
The clone eventually absconded with his wife and daughters, fleeing from Byss aboard a stolen shuttle. The family eventually settled on Jakku where they struggled to survive in the desert as moisture farmers during the New Republic Era. Unlike their father, Rey and her younger sister Kira inherited Sidious' power and Rey was deemed worthy to serve as a host for her grandfather's spirit. Determined to claim his elder granddaughter, Sidious ordered one of his Acolytes, Ochi, to find and bring her to back to Byss. Erros chose to send her and Kira at the Jedi Praxeum on Yavin IV for their own safety, in the hopes that they would learn to use their power for good purposes. Erros was able to escape Ochi's attempt on his life thanks to his wife's sacrifice. Shaken by these events, and fully aware of who had sent the assassin, he vowed to destroy his "father" if it was the last thing he ever did.