Danny was always alone. When he was growing up, his parents ignored him while his sister, Jazz, took care of him. She was the only one who ever remembered his birthday, or helped him with his homework; however, she had a life as well. When he was ten, and she was sixteen, she graduated high school early and left for college.

When he was fourteen, and the portal was finished, Danny was genuinely interested in what it was like on the inside. He was the only person in the house when he went in and accidentally turned it on. When he got out, he was terrified. He thought that he had died and become a ghost, and his parents would hunt him. Then two white rings formed around his body as he was curled up in a fetal position, wishing to be human again.

The rings parted and he was back to normal. He decided to experiment to see if he could do it again. He concentrated on seeing the boy that had his inverted color scheme and the rings formed again, this time, revealing the boy's inverted colors of white hair and green eyes with tan skin. He was also wearing a really ugly jumpsuit. He decided to change his outfit in, what he decided to call, his ghost form. He grabbed some cash that he had made over the years from writing books and selling artwork, two things he was very good at, and went to the store.

Back in his human form, he found a black t-shirt, black skinny jeans, a loose black hoodie, white belt, and a pair of black combat boots. He also found white fingerless gloves. When he was leaving, he saw something that gave him an idea. He went to the fabric store and got some white fabric to use to put a white DP logo on his outfit.

He had decided earlier that his name in ghost form would be Danny Phantom. He had decided that as soon as he became a legal adult, that that would be what he changed his name to. Now he didn't have to wait. He had chosen that name because he lives unnoticed, he is like a phantom, everyone can see him, yet nobody seems to know he exists. He had also come up with the logo a long time ago while drawing.

Over time, he started fighting ghosts. His ghostly obsession was even to protect due to his thinking that he didn't want anyone to have to go through anything like what he did. The ghosts got through the portal when Maddie and Jack Fenton found out they didn't know how to close it other than to unplug it. They wouldn't unplug it though, for fear that it would not open again.

When he was fifteen, and finally used to his powers, he met a boy named Tucker, and a girl named Sam. Tucker was a nice african american boy who was obsessed with technology. He was thin, and out of shape, and ate WAY too much meat. Sam was a goth girl with black hair and amethyst eyes. She was thin, in shape, and didn't eat anything with a face. They all started hanging out together, but Danny kept enough distance so that his secret of being the town's hero Danny Phantom would not be revealed. He is seventeen now, and blissfully unaware that he is the future king of the ghost zone.