Medusa was a mother to two young children, a young boy who she named Crona, then there was her daughter. She was a witch prodigy, from a young age using her powers like a full grown witch would. She knew Crona would never meet the standers like she did and used both of them for her plan on black blood and destroying DWMA. Her when she was about five at the time, old enough to remember her words,
"Mother will come for you once everything is ready." With that she was put in from of house, not knowing where she was at all. So scared and alone she started crying, this caught the attention of Spirit.
"What do we have here, a poor young girl all alone out here." He looked around to see if anyone was near but no one was. Picking her up he took her inside and tried to find out who she was at all, Since they knew nothing they named her maka and took her in as one of their own and him and his wife always wanted a kid so they took care of her. They couldn't sense her witch soul cause a spell put on her, Over the years she grew into a bright young girl learning where she was and never telling anyone of her past. Now knowing what they did to witchs, soon spirit and her step mother divorce and she left to travel.
"You'll be starting your first year at the DWMA." Spirit told Maka at the dinner table, remembering some of thing Medusa said about hating that place. Soon after dinner going to bed knowing this will be more hard to hide her powers but knowing being a mister will be more hard. "what if my weapon sees my witch soul?" out of all the quest that one stood. she hope that wouldn't be a problem as she drifted to sleep.