Satana is a fictional character, a comic book half-demon appearing in the Marvel Comics universe. She is the sister of Daimon Hellstrom, also known as the Son of Satan.
Satana first appeared in Vampire Tales #2 in October, 1973. She was created by Roy Thomas and John Romita.
Satana and Daimon were born in the fictional town of Greentown, Massachusetts. They were the half-human children of Satan (their father was later retconned into a demon named Marduk Kurios ). Satana and her brother were groomed by their father to be evil, but Daimon rejected these teachings, while Satana embraced them.
When Satana was still a child, her mother, Victoria Wingate, discovered her husband and children's true nature and was driven mad. Daimon was raised by servants, while Satana was taken to her father's particular Hell-dimension (of which there are many in the Marvel Universe) and taught black magic. As a reward for her devotion to him, Satana's father gave her a familiar named Exiter, with whom she formed a close bond. Satana began studying magic under her father and the demon Dansker. In Hell, her soul was bonded with an evil spirit called the Basilisk (not to be confused with the Basilisk) in order to increase her magical power.
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Official Site: Marvel Comics
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