Early Life

Despite common belief, not all demons are born in the Netherworld. Maka was born to a demon couple who had been living on Earth all their life, so human culture was all she was familiar with. She went to human schools, played human games, went on the human internet; Maka wasn't too different from any other person in all but background.

Of course, Maka wasn't completely unaware of her heritage. Her family told her many stories about the Netherworld, particularly their ancestral netherworld ruled by the legendary Overlord Valvoga: a mighty being comprised of the demon general Micky, the fallen angel Ophelia, and the star dragon Dryzen. Even things like Maka's powers of star magic had ties with Valvoga.

Maka found a lot of comfort in those stories. While she didn't hate her life on Earth, she never felt like she "belonged" among humans. Of course, her own disabilities and having to hear about constant tragedy didn't help.

Adulthood

Some time during her adulthood, Maka left Earth for Valvoga's Netherworld, and even ended up meeting face-to-face with the Overlord themself. Surprisingly, Micky was more than willing to give her a home in his netherworld (much to Ophelia's chagrin). With that settled, Maka settled on one of the many moons that orbited the planet, and took up the mantle of the "shaman" demon class.

That's the story Maka tells, at least. For right now however, all she's worried about is keeping her rent paid. Living in the Netherworld ain't cheap.