Harry Potter: a good and clear sense of parenting. I mean, the Cursed Child pretty much portrayed him as a bad father who didn't know his son clearly, told him to his face that it would be better if he wasn't born and severed Al's friendship with Scorpius just because of a freaking dream in which he saw a shadow around Albus.
"It does not do to dwell on dreams," Albus Dumbledore has spoken.

Ronald Weasley: table manners. And you all know why I said that.

Ginny Weasley: uh... She's a tough one to decide... Let's just say that she's badly in need of getting the authority to name her kids I'm perfectly sure that any name she would have come up would be better than naming someone after Severus.

Severus Snape: getting over past grudges. And also his obsession over Lily Evans. And a handbook on how to be a good teacher without terrorizing the students. I mean, come on, Neville's boggart was Snape, how mean can someone get to be an adorable kid's boggart?

Vincent Crabbe and Gregory Goyle: a pair of brains each. It bugs me how they managed not to get expelled from Hogwarts on their poor academic performance.

Neville And Luna: getting together. I mean they are just so perfect for each other and they simply need to be a couple. In the whole HP universe, this is one ship (Nuna) that I completely wanted to sail. And look how it ended up. Even though I literally adore the cinnamon roll that goes by the name of Newt Scamander, and am completely in love with that guy, still it isn't enough excuse for his grandson to go butting in where he isn't invited. And no, he's definitely not allowed to get married to Luna Lovegood. Absolutely no way. Same goes for Hannah Abbott (P.S it's nothing personal against Rolf and Hannah).

Pansy Parkinson: a straight punch in the face (don't know why I wrote that, though. That girl typically pisses me off).

Bellatrix Lestrange: Sleakeazy's Hair straightening potion. Or a good shampoo, for that instance.

Lucius Malfoy: signing up for a hair commercial instead of joining the Death Eaters.
"I'm Lucius Malfoy and I use Loréal. Get gorgeous straight hair in just 14 days. Say goodbye to hairfall and hello to ultimate luscious hair."

Narcissa: she's perfect the way she is. But I think she should dye her hair completely in one color except the black and blonde look. It makes her appear to be a chipmunk.

Draco Malfoy: getting over his absolutely ridiculous fear of ferrets. According to a theory, Scorpius's Patronus is a ferret and well who would like to see Draco hiding away when his son casts the Patronus charm in front of him for the first time?

Walburga Black: permanent sticking tape on the mouth of her portrait as well as an eternally lasting Silencing Charm. She shouts too much and it usually (always) hurts the average human ears.

Fred Weasley: A GOOD LONG 80 YEARS OR MORE OF HIS LIFE! Sorry, I still can't get over the fact that dear Freddie died. I would love to see him with George in his old days cracking jokes and having wheelchair races with him. (I'm gonna hide to cry away in a corner now).

Dobby: SAME AS FRED. DOBBY DON'T DESERVE TO DIE, MISTRESS ROWLING. DOBBY IS A FREE ELF. ALWAYS HAVE BEEN.

Charlie Weasley: more projection in the books and movies alike. I mean he's an amazing character and yet most readers do not even know that he exists. Pitiful.

Peter Pettigrew: a sense of loyalty to his friends. And a bucket load of moral values. I mean Peter, honey, you simply don't go and betray your friends like that just because you're scared of a bald no nosed Lord thingy. The Marauders were your friends and brothers for seven freaking years. You simply can't betray them. And now that you did... Well, I'll write a chapter on this later.

Percy Weasley: put his ambitions aside for a moment. There's not much I've got to say about Perce though. So well... Let's just say he needs to be taught that family comes first. Even though he did learn it by the end of the Deathly Hallows.

Fleur Delacour: English pronunciation and accent. That's it, other than that Fleur's okay I guess.

Petunia Dursley: a sense of humanity. For the sake of Merlin, Harry was the son of your own one and only sister and you let the poor child rot away in a cupboard for 11 years? You in your right mind, woman?

Vernon Dursley: a continuous talk down like the one he received from Mad Eye.

Hedwig: I'm crying, I'm definitely crying. Why Hedwig? Why why why? A few more years of her life won't have done any harm.

Dolores Umbridge: a teapot full of poison down her throat. I hate her more than I hate Voldemort and trust me that's saying something.

Hagrid: the books say that Sirius was the only one Harry had closest to a father figure. Oh really? I object. How can you all forget Hagrid? Hagrid brought Harry to Dumbledore after the attack at Godric's Hollow, he found Harry with the Dursley and gave him his letter, he took Harry to Diagon Alley. He was as much a father figure to him as Sirius was. And... A much braver man than Severus would ever be. I would have been pleased if Harry named at least one of his sons after Hagrid instead of naming him after Snape who practically bullied Harry and tormented him all the time. Enough said. Case closed.

Sirius Black: his freedom. The poor man did nothing worth being guilty for and yet he had to spend 12 years in Azkaban and when he finally escaped, a veil gobbled him up. How fascinating! (Not the sarcasm).

Remus Lupin: full wizard rights. Okay I get it that he suffers from Lycanthropy but it's not like its his own fault. And he's not in the least like Greyback so he should be treated well, given a job, respected and not shunned off by the wizarding community. And yes, I never wanted him to die.

Albus Dumbledore: a need to explain himself. Poor Harry was always left in riddles and had to find out what to do after struggling for long and seriously Dumbles thinks its best if things are left to their own course. And see what he has to say for himself now...

Lord Voldemort: ah yes, I was saving this for last; he is in need of a lot of things apparently. His human looks first and foremost, a nose, hair and humanly skin tone. Some common sense; I mean why would you wait to finish Harry Potter and strike at him at the end of the year just so his education process doesn't get ruined? Why the hell would you make your Horcruxes so predictable? And why would you make a snake into a Horcrux knowing full well that it could get killed or die biologically for that instance? And last but not least, why did you bring that Delphi into existence? (I'll make another chapter on that I think).

These aren't all of the characters, I didn't have enough time to write them all.

Upcoming chapter:
Preferred Drinks Of HP Characters.