The Phantom menace
Living with ghost-obsessed parents since birth, Danny had to put up with his parents' "unique" personalities, which often traumatized him. Danny wanted to be an astronaut when he grew up, and had no interest in hunting ghosts. However, this did not stop his curiosity that one day changed his life forever. While exploring his parents' laboratory, Danny accidentally activated the newly-built Fenton Ghost Portal, causing his molecular structure to become infused with ectoplasm. Danny became half-human and half-ghost and gained ghostly superpowers.
At first, Danny Phantom was not a particularly well-known or well-liked ghost. His debut to the people of Amity Park was ruined when Walker staged a ghost invasion on Amity Park and framed Danny for it, and later when Freakshow took control of Danny's mind and forced him to perpetrate a series of ghostly crimes for him. Events such as these caused the people of Amity Park to hate Danny Phantom (then known as "Inviso-Bill"), despite his intentions to protect them. Danny's only supporters were his two friends Tucker Foley and Sam Manson, and, unbeknownst to him, his sister Jazz.
Danny met Vlad Masters, his parents' friend from college, now a millionaire bachelor. Danny found out that twenty years ago, Vlad became a half-ghost just like Danny, and now had all the same powers he had but with twenty years more experience. Vlad soon became Danny's arch-nemesis.
Danny defeated Pariah Dark and saved Amity Park from being trapped in the Ghost Zone for eternity. Amity Park finally recognized him as a hero. (It was at this point when Danny confirmed to the town that his name was "Danny Phantom" and not "Inviso-Bill.") This also helped his standing in the Ghost Zone, as the Far Frozen began to know him as "The Great One" and "Savior of the Ghost Zone." However, Danny's parents and his then-love interest Valerie, the three people he most wanted to believe in him, still did not view Danny Phantom as anything but a menace.
Danny witnessed an alternate future where he gave up his human half, causing him to become fully ghost and much more powerful, but ultimately extremely evil. His own future self-turned out to be his ultimate enemy.
Throughout his adventures, Danny made a number of allies, including his half-ghost female clone, Dani, a Yeti-like ghost named Frostbite, and a werewolf ghost named Wulf.
Danny witnessed an alternate future where he gave up his human half, causing him to become fully ghost and much more powerful, but ultimately extremely evil. His own future self-turned out to be his ultimate enemy.
Vlad created a new team of teenage ghost hunters, the Masters' Blasters. They were inexplicably able to hunt ghosts much better than Danny could, embarrassing Danny to the point where he began to seriously question his status as the superhero the people wanted. He was so depressed that, despite his friends' protests, he used the Fenton Portal to remove all his ghost powers, becoming fully human again. At the same time, however, a much bigger crisis - a Disasteroid - was headed straight for Earth, timed to collide in just one week and destroy the entire planet.
With renewed determination, Danny returned to the Ghost Zone to seek help. His enemies in the Ghost Zone, however, were all too glad to see him in his powerless human state, and took great pleasure in blasting him over and over. This inexplicably caused Danny to regain his ghost powers. Gaining help from his allies and enemies in the Ghost Zone, humans and ghosts worked side-by-side, and they successfully saved the Earth from the Disasteroid. Danny finally revealed his secret identity and was hailed as a hero all over Earth.
Danny possesses a variety of superhuman powers and abilities due to his unique physiology. Danny can transform between human and ghost at will. This manifests as white rings extending from Danny's waist, then sweeping across his body. Once transformed, he can use all his ghost powers. He can also switch back to human form at times to pass through ghost shields, and he can still access some of his powers like weak ecto-blasts and intangibility in human form. Danny can turn his body intangible to pass through walls or other solid objects. Danny can make his body invisible to both humans and ghosts. Gravity doesn't affect Danny's ghost body, so he can fly through air and space at considerable speeds and heights. While flying, his legs often become a ghost tail. Danny can fire green blasts of ecto-energy from his hands or fingertips. These blasts often explode on contact and are powerful enough to melt steel. Danny can generate shields made of solid ecto-energy that can nullify or even reflect attacks from other ghosts. Like his ghost rays, Danny's shields are green in color. Danny can use his ecto-energy to increase his body's physical strength. Danny can send ecto-energy as electricity through an electric current. This power can negate his enemies' electric attacks and send them back at the attacker called the Ghost Stinger. Danny can project light from his hand using ecto-energy. Danny generates an extremely powerful sonic blast that can destroy buildings and cause severe damage to both humans and ghosts. The ghostly wail is Danny's most powerful ability. Telekinesis, Danny can move objects from a distance by grabbing them with ecto-energy. Overshadowing, Danny can possess the mind and body of a person or animal, allowing him to completely control his or her actions. While overshadowing, Danny can still use his powers of flight, intangibility, invisibility, and ghost rays. With the Fenton Helmet, Danny can introduce himself into computer software and overshadow his video game avatar to use his ghost powers in video games. Danny can separate a possessed person from a ghost overshadowing them simply by grabbing them with his hand or using a ghost ray. Danny can overshadow a sleeping subject in order to get inside and influence his or her dreams. Danny can create duplicates of his body that all have his ghost powers and can fight alongside him. After seeing Vlad use this power during their first encounter, Danny spends much of the series trying to learn it, finally mastering it. Cryokinesis, Danny can fire blasts of icy energy from his hands or eyes that can freeze enemies on contact, radiate cold energy from his body, and create objects from ice out of thin air. When using this power, his eyes turn icy blue instead of their usual glowing green. Danny can combine cryokinesis with his other powers for enhanced effects, such as firing an icy explosive blast or generating an ice shield to block fire attacks. Ghost Sense, When Danny is near other ghosts, a cold blue mist comes out from his mouth and a chill goes down his spine. Danny can bend, twist, and otherwise contort his ghost body far beyond the limits of normal human physiology. Superhuman Strength, Superhuman Stamina, Superhuman Reflexes, Underwater Breathing, Vacuum Resistance though he still needed a helmet. Quick Learning Ability, Danny is able to quickly learn new things, even often being able to copy many of the powers his enemies use against him without any training. As a half-ghost, Danny is resistant to many types of ghost powers that normally harm humans. Danny is a considerably skilled pilot, having much experience with the Specter Speeder as well as with spaceship simulator video games.
Sam was Danny's friend since at least the second grade and was one of the first two people Danny trusted with his secret the other is Tucker. Sam always had a little bit of a crush on Danny, but Danny, at first, showed romantic feelings exclusively toward Paulina, which made Sam extremely jealous. However, Danny had rejected Paulina, and Danny and Sam had become a romantic couple.
Madeline "Maddie" Fenton is the wife of Jack Fenton and the mother of Jazz and Danny Fenton. She is a scientist and ghost hunter just like her husband, Jack, however she is better at ghost hunting and more intelligent than him. Maddie serves as the more rational parent and shows more concern for her children's welfare than her husband. That said, she has extreme obsession whenever it concerns ghosts and poses a large threat to ghosts. Unlike Jack who merely wants to rip them apart, Maddie believes in a more scientific approach, preferring to examine them. Of course, she often unknowingly makes Danny nervous whenever she talks about how she wants to dissect a ghost or study the remains after she blasts them to tiny bits. Not much of Maddie's past is revealed outside of her college days when she was friends with Vlad and Jack. The three worked on a Porto-Ghost Portal that backfired and caused Vlad to come down with Ecto-Acne. This was due to Jack looking at her instead of his work, causing him to accidentally spill cola into the machine instead of ecto-purifier. Maddie is an accomplished martial artist (ninth degree black belt) as well as marksman and technical whiz. Maddie, despite her obsession with ghosts, absolutely loves her family and will do anything to defend them. After the events of the Disasteroid Maddie learned of his son being a half ghost, she worried for him and gave him a body check. Danny had a lot of scars on his body from his fights as phantom. Maddie couldn't bare the thought of the hardships Danny went through and she know she was not able to prepare him for what lays ahead of him. So she called on old friend that she met long ago in her teen years. The sound of the phone ringing then some pickup, it was a man speaking Japanese, "We have your child hostage." rather than a normal "Hello", Then she hears a girl in the background saying." Apachai that not how you answer the phone." "Hello, Sorry about that he doesn't speak Japanese very well. This is Fūrinji Miu, Of The Ryōzanpaku Dojo, how may I help you." "yes I will like to speak with Sakaki Shio, could you tell him is Maddie Fenton."