Persephatta Soong was a female Human clone. She was the creation of Dr. Adam Soong.
She was created through a somatic nuclear cell transfer and was gestated in a proprietary medium. Before she died, her liver failed resulting in her brain swelling up. She had not lived to see her fourth birthday. (PIC: "Two of One", "Mercy")
This character was only mentioned in dialogue.
"Persephatta" is an alternate spelling of the name "Persephone".