Disclaimer:

I own nothing just the character Billie and even then I feel like she was just the missing Fenton child that should have been. Danny Phantom is currently owned by Nickoloadeon Studios and the story and other characters made and rightfully belong to Butch Hartman. Genderbent Valerie was inspired by the Amethyst-Ocean character on Deviantart. His name is Victor. Victor Grey. So to repeat I own nothing. I hope you enjoy my take on the Danny Phantom storyline.

In the start Jack and Maddie Fenton the leading ghost experts and scienists were building a full scale version of their college days model of a ghost portal that would lead them to a world unscene. They had three children in their marriage. Their oldest Jasmine; she goes by Jazz by short and a year later they had their twins Daneil also known as Danny and his sister Billamina who they call Billie. You can blame Jack for this one. He and Maddie loved the name Willamina but he did not want his daughter's nickname to end up being Willie and he just didn't understand the whole Willaim/ Bill issue. Anyway that's why her name is Billamina. Moving forward Jazz was less than interested in the ghost science of her parents and Danny could say the same. Jazz was more interested in psychology and Danny loved space; Bille however was interested in her parents' work but did not hold the same obsession as them.

When Danny and Billie were just fifteen their parents were building this very strange machine, but didn't want Billie to be messing with this science just yet because it was very dangerous. Yet when it didn't quite work they were supposed to just quit. Billie took a look at her parents' notes and blueprints and spent the entire night and following day trying to figure out what went wrong. During lunch that day while Bille was too focused on the blueprints by the tree where her brother and friends were eating Danny ended up being the one to explain what she was doing. "What is she doing?" Sam asked Danny as she sat down next to him. "Yeah she looks like she's in a total trance." Tucker said as he flicked a fry at her which landed on her beanie. The only sign Bille showed that she even knew what Tucker did was when she grabbed the fry and chucked it back at Tucker. Sadly for him she had her mother's aim and it hit him in the back of the throat causing him to choke. "Knock it off Tucker." Danny said annoyed. "Our parents built this thing in the lab and she is trying to figure out what went wrong so they would let her in on more of their experiments." This did cause Billie to give him an annoyed and dirty look. "Really Danny? It is so much more than that! This could lead to a complete new understanding of our universe and maybe even the next." Billie said excitedly.

From a distance the A-Listers were watching Billie geek out of the blueprints. "How can someone so hot be so smart?" Dash said, gaining Paulina's attention. Dash had a small crush on the youngest Fenton and this did not sit well with Paulina. "Please she is a total geek, a nerd, a loser. A complete FREAK. She's nto even pretty. I mean what is going on with her hair. Dying the roots green. Puke." She said with a laugh. Danny blushed with embarrassment at Paulina taunting Billie. "Yeah. Puke." He said with a sigh. Kawn placed a hand on his friend's shoulder. "Yeah. I mean what is with those clanky green combate boots and metal techy belt. And always wearing that matching green sleeveless hoodie. She really has no style." Star said, adding into the taunting making Paulina laugh harder. "Though the black fingerless gloves and black pants aren't terrible." Star said. "Ew. Star no. She's wearing boy jeans. Super like unflattering." Pauline remarked back.

All Sam could hear from the A-List table was laughing but she could see them pointing at Billie who chose not to listen to the taunts and jabs she usually received about her choice in clothes. She wore stuff the kept her safe in the lab and the hoodie was sleeveles cause it was hot but she wore the hoodie because she was a bit more developed than people her age and with her also being as thin as her brother she was embarrassed about her figure. Sure some might say she looked hot but she also knew what the girls would say. They would body shame her. Say that she was trying too hard and it was a bit much. She heard these comments in the store when she went bra shopping with her sister and those people didn't even realize that they were making those comments about her. At least with a hoodie she could hide her figure. It also had her favorite band on it. Dumpty Humpty. She also didn't want that kind of attention, positive or negative. Her belt was a prototype a a spector-deflecter and the green was ghost green her favorite color. Her hair was a pixie cut the same color as her mom's and she had dyed her root green. Most dad's her dad will tell her that she was a spitting image of her mom because they share so many facial features, body style, and eyes. She can handle most comments thrown her way. She didn't care about the opinion from people who she really didn't like to begin with. I mean what would be the point?

Sam however could tell that they still would get to her no matter how hard she tried to ignore them. That is when she came up with an idea. "Hey after school, how about you show us this?" Sam looked over to the blueprints in Billie's hands and saw the name of the project the Fentons were working on. "Ghost Portal." Danny felt uneasy about that. "I don't know my parents aren't exactly open to letting just anyone into the lab." Tucker then slid into Danny and placed his arm around Danny. "Come on man, what is the worst that could happen?" Billie looked up and joined the convo. "Mom and Dad won't be home when we get home from school. I heard them talk about getting parts for the portal this morning. So we have a few minutes at least. Besides, I do want to get a look before they start messing with it again." Billie said. "So it's settled then." Sam said.

After school that day they went downstairs to the basement and Sam had her polaroid camera with her taking pictures. Billie went to the table and placed the blueprints down spreading them out. She had a theory about what went wrong and took a glance over the machine before finding what she was looking for. "Hey I need to go back up the stairs and grab something I think I might have actually figured out what went wrong." Billie said, climbing the stairs. "Also don't touch anything." With that she closed the door. Tucker then turned to Danny who was taking everything in. He did not spend as much time here as Billie did and so it was all a little freaky. "Do you think this thing could actually work?" Tucker asked, sceptical looking at the machine in question. "I don't know, I really don't like being down here. It always creeped me out. I really don't know how Billie can spend so much time here?" Danny admitted. "Oh, come on Danny, this is actually cool. A portal into another dimension I mean what if it could work?" Sam said. Danny thought about it for a moment before realizing that she was right. "I mean yeah. I have always wondered what it would be like to go in there."

"Then why don't you?" Sam said, holding a hazmat suit that was his size. "Be serious." Danny said, as Sam chucked the suit at him. "I am come on. You could be the first person to go to another dimension." She said Danny eventually gave into the pier pressure and put the white hazmat suit on but Sam saw that it had Jack's face on it and tore it off. "Can't have you meeting ghosts with that on your chest." Danny gave her a smile and then turned to the portal. It was dark and he could barely see anything. "One small step for man." Danny said to himself. "One giant leap for mankind." He finished with a shaky breath. So Danny Fenton went to take a look inside of it. He was tracing his hands along the wall and felt something odd and accidently ended up pressing it. By this time Billie was coming back down the lab steps when she noticed Danny was missing and got this sinking feeling in the pit of her stomach. "Sam. Tucker. Where is Danny?" Billie asked worriedly. Sam gave Tucker a look telling him not to cave and in any other instance he would have listened if not for one problem. He was actually more scared of Billie than he was of Sam. So when Billie gave him her signature glare he cracked and looked at the portal.

Billie's eyes went wide and she hopped down the rest of the steps rushing toward the portal yelling. "Danny, get out of there. Mom and Dad goofed, they put the on button on the inside of the portal." Suddenly there was a great big flash and everything just changed. Danny screamed as his molecules got rearranged. The blast flew Billie, Sam, and Tucker back away from the portal which was now smoking and when they opened their eyes. They saw Danny stumbling out but he was different. His suit was inverse. Black boots, gloves, and hair were snow white and the white body was black as night. He had glowing green eyes, disappear, and fly? Well maybe just hover for now. Then there was a ring of light that circled Danny turning him back into a human instead of a GHOST! But he was back into his normal clothes. Tucker noticed Danny was weary on his feet and rushed to him, catching him before he fainted.

At the moment the Fentons came rushing into the lab having heard the explosion. "What is going on down here?" Jack shouted. "Danny!" Maddie said seeing her baby boy. "We figured out what went wrong with the portal. The on button was on the inside of the machine and Danny kind of pressed it." Billie calmly told her parents. They did not waste anymore time to rush Danny to the hospital. Sam and Tucker went home. Billie on the other hand went to the hospital gift shop and got herself a new notepad and pen because something was going on with Danny and she needed to figure out what. He was half ghost. That much was clear but what were his powers? Was he going to be ok? Would the ghost take over? These are things she needed to figure out and more to make sure her built-in best friend stayed safe and healthy with this new change in life.

Billie hurried back to Danny's room for the most part. The doctor's said he just had a nasty electrical shock but was lucky that he didn't even have any burns on his fingers or hands, but they did want Danny to stay the night. Maddie said he was lucky that it was Friday and he wouldn't be missing any school. Billie heard the doctors say that despite the heart palpitations from the shock his heart rate was slower than normal and his temp was lower than normal. Billie wrote this down; she had somehow convinced her parents to let her stay with Danny in the hospital while they went home to check on Jazz and fill her in on what happened. Danny and Billie were also extremely lucky that neither of them got grounded for today's events. But from Billie's notes of what happened today and Danny's state and the fact that the Ghost Portal was now working. She was worried. What would their parents do if they ever found out about Danny's other half and she was an expert in her own right but Danny would need a real doctor when his abilities started to grow. She could only pray that she would be enough for her brother. She was going to stand by his side and keep this secret for him however long he wanted to keep it. They were in this together. Forever and always.

Billie had texted Sam and Tucker what had happened and her theories about what was going on with Danny. At first Tucker told her she was crazy that was until she saw Danny groaning in his sleep changing from his human form to his ghost form on and off again. Billie explained further and eventually Sam could not help but agree. During the night Danny ended up floating which startled Billie waking Danny up causing him to fall crashing back onto the bed and falling to the floor. A nurse rushed in at the noise and Billie quickly explained that Danny just had a nightmare and rolled out of bed. This seemed to satisfy the nurse, because she left. Danny however just gave her a look. She rushed over and in a whisper started to explain what really happened and her theory and what Sam and Tucker thought. Danny was overwhelmed by the information that Billie had given him and was processing everything but what she told him made sense. They agreed that when he got home and the rents were off their backs that they would try to figure out all that he could do and try to get control over his new powers. Danny also agreed with Billie that only the two of them, Sam, and Tucker should be the only ones to know about his powers.

"Danny there's one more thing I need to ask." Danny was about to go back to sleep when she spoke. "What Billie?" He could see that she was nervous about this. He sat up and took her hands into his. "Do you want me to try and find a cure because I am not a hundred percent sure I could and if we don't tell mom and dad about this then it would be up to me and I just don't think I could do it." Billie said with shaky breath. Danny pulled her into a tight hug and whispered into her ear. "I would never put that kind of pressure on you." He pulled out of the hug and smiled at her which she returned. "Also I think it could be cool to be part ghost. Definitely when I get the flying part down." Billie could not help but chuckle at her brother's antics. "Go to sleep you dork." Danny got back into his bed and told her to do the same. When morning came Danny was given a clean bill of health and they both were scolded on the way home but not as bad as it could have been since Danny was technically fine and the portal was working. Jazz however was smothering them after hearing what happened and because even more positive that their parents and Billie needed to stop with this stupid ghost nonsense. Danny and Billie were nervous about how they were going to deal with this new chapter in life but they knew that they were only going to get through it together.

So I had read a fanfic that had a phantom twin and this was inspired by that but I promise this is an original fanfic that goes along the storyline of the original show. I made Billie a scientist like her parents because I just felt that at least one of their kids would have been interested in the tinkering part of ghost hunting. Also I feel like she could add a lot to the team. I also ship SamXDanny but I will admit that I did love the storyline of DannyXValerie and now this a female twin to take over that role I can have both. Yay. Lowkey the real reason why I added the twin. Anyway I hope y'all enjoyed this. I will try to update at least once a week. Along with my other stories. One last thing I made Billie's body type this way because I have a friend who has dealt with this kind of insecurities about her body and the shaming that came with it. There were never any health images growing up for her that were similar to her's and she grew up with an idea that she needed to cover up and be embarrassed. Through this story Billie will gain more and more confidence in her own skin and I just want to remind everyone who reads this that you are beautiful just the way you are. Rather you have big boobs or are flat chested you're perfect. So don't go changing because others said you should. Stop body shaming and love yourself, because you're pretty amazing just the way you are.