In Evanesco
, Harry Potter is taken in by Jack and Maddie Fenton instead of the Dursleys, and grows up with Danny as his brother. After he goes off to Hogwarts for his second year, Danny ends up triggering his portal accident years ahead of canon, causing all sorts of interesting developments.
- Adaptational Jerkass: Since Harry is with the Fentons, who treat him much better than the Dursleys did in canon, even if they can be somewhat oblivious a lot of the time, him wanting to leave them for Sirius is portrayed less sympathetically, and Danny and Jazz are both worried about how he's become more dismissive towards Muggles and try to get him to realize the flaws in how the wizarding world does things, causing him to get defensive.
- Adaptational Angst Upgrade:
- Initially Inverted with Harry, who is much happier with the Fentons than he was canonically with the Dursleys. Unfortunately, this makes Danny keeping his half-ghost status from him in his second year (both because of Danny's own angst and Harry already dealing with the Chamber of Secrets issues) hurt even worse. And then there's repeated friction between him and Danny and Jazz...
- Danny's angst about being half-ghost is even worse than in canon, in part because he’s even younger when it happens, and having to rescue ghosts from the lab where his parents are subjecting them to horrible experiments doesn't help. He gets so worried that that he'll become evil that he actually goes to Skulker, who was trying to hunt him, for answers and reassurance. Later, his relationship with Harry starts to become strained, and he deals with Dan much earlier than in canon, with the angst about what happened being explored more. And then he becomes the new King of All Ghosts after inadvertently felling Pariah, with abdication not an option.
- Age Lift: Danny gets his powers at age 11, when Harry is dealing with the Chamber of Secrets, where in canon he got them at 14.
- Animals Hate Him: After Danny becomes half-ghost, animals are more skittish around him. Even Hedwig, who's known him for over a year at this point, is rather spooked by him when she sees him for the first time after the accident.
- Caught Monologuing: When Danny is alone with Hotep and realizes that he's a wizard, his questions get Hotep talking about his past and how he ended up the way he is, Danny realizing that he's letting important information slip and subtly prodding him to continue.
- Cover Identity Anomaly: A MACUSA witch named Jenny tries to ask Danny and Jazz questions after Pariah Dark's invasion. Besides the typical wizard failure to understand how non-magical fashion works, like wearing a tie over a Hawaiian shirt, she's lucky that the siblings are the first ones that she meets, because she's pretending to be an FBI agent and calls it the Federal Bureaucrats of Investigation, which the duo lampshade, along with how she's stepping on the jurisdiction of the Guys in White.
- Death by Adaptation: In Chapter 28 Jack, Maddie, and Jazz all die, where they lived in canon.
- Deconstruction: The story deconstructs several aspects of Harry Potter canon, like how wizards can just alter the memory of Muggles who witness magic.
- Flawed Prototype: Hotep apparently beat Herpo the Foul in being the first wizard to make a horcrux, but while the process to split his soul and bind it to his scepter and wand worked, his body couldn't withstand the power of the spell used and was destroyed in the process, forcing him to wait millennia for a chance to trap other souls within his power and restore himself. Clockwork later elaborates that what is in the scepter is merely a fragment, and the rest of Hotep’s being withered away to nothing.
- Fridge Logic: Some In-Universe examples.
- When McGonagall uses the Vanishing Charm to make a box of ectoplasm-contaminated fish sticks disappear, Ron wonders where the things affected by the Charm go. All Harry can say is that he's never really considered it.
- When Harry tries to get Danny an owl for Christmas, he keeps hearing that wizard owls don't like Muggles. He's curious about why that is, though, and why Hedwig gets along with Danny and Jazz despite their lack of magic, but no one can answer him.
- Gilligan Cut: Harry hopes that Danny is having a better time than he is. Cut to Danny fresh after the portal accident.
- Happily Adopted: Harry is adopted by the Fentons, and is much happier than canon as a result. Unfortunately, friction starts to emerge after Danny becomes half-ghost.
- Impersonating an Officer: A MACUSA witch named Jenny has shown up twice, claiming to be an FBI agent in an attempt to investigate the ectoplasm detected in Amity Park. The first time Danny and Jazz see through her disguise, both because of the fact that she's combining a Hawaiian shirt with a tie and skirt, and can't even get her organization's full name right. The second time she tries doing it to Vlad, who also sees through it because this time she's wearing a bathrobe, though he merely assumes that she's some kind of tabloid reporter.
- Innocently Insensitive: Harry writes in a letter that Danny is dead (due to McGonagall being mad at him for sending Harry ecto-infected meatstuffs again as a prank, with Harry trying to warn him that she might send Danny a Howler) not long after he's become half-ghost.
- "Not So Different" Remark:
- At one point Danny starts drawing deliberate parallels between how their parents treat ghosts and how wizards treat muggles in order to drive in the flaws in wizarding society that Harry is deliberately ignoring, acting like he's talking about ghosts to keep from cluing Sam and Tucker (who don't know that Harry's a wizard) in.
- When he's talking to Mr. Weasley about batteries later, Danny admits that he's sounding like his father rambling on about ghosts, but he's too excited to care.
- Reluctant Ruler: After defeating Pariah, Danny finds that he has become the new Ghost King, and that it's a Resignations Not Accepted scenario where he can only hide the Crown of Fire away so isn’t visible and is unable to do so much as remove it. Despite Clockwork telling him to accept his responsibilities, after he informs Danny of the Horcruxes and sends him home he says that he's far from disappointed in him for being so, and given what Dumbledore canonically says, it might be a Secret Test of Character.
- Resignations Not Accepted: Much as Danny might want to abdicate after becoming King of All Ghosts upon beating Pariah, he's unable to so much as take the Crown of Fire off, let alone give up the throne. The best he can do is hide the Crown while still wearing it.
- Sure, Let's Go with That: After Harry sees that Danny's shiner is gone, he assumes that he used concealer during his rather long bathroom break, during which he was fighting off a ghost. It's actually because his Healing Factor fixed it, but Danny goes with it.
- Taking the Heat: Danny takes the blame for Dobby breaking the ecto-filtration prototype so that Harry won't get punished for it like Dobby had hoped.
- Unwitting Instigator of Doom: Harry telling two Unspeakables about the Amity ghosts ends up getting Jack, Maddie, and Jazz killed, along with said wizards.
- Wham Episode: In Chapter 26 Sam and Tucker start to get read into magic and Harry being a wizard thanks to Hotep, and Clockwork informs Danny of Voldemort's Horcruxes.
- In Chapter 28, the Ministry wizards inspecting the ghosts in Amity end up trying to steal the Fenton portal, killing Jack and Maddie in the process, and Jazz sacrifices herself to save Danny and take them both out.
- What the Hell, Hero?: Both of the Weasley parents are furious about Fred and George's prank on Jazz, and lay into them about it.
