I. Already Written: “Did you just Apparate to Egypt!?” - Yes, Ron so did apparate all the way to Egypt from his London Flat once he got the letter, he was actually sitting down for dinner when Hedwig arrived with Charlie's letter. It wasn't one big 'jump' from London to Egypt though, no he went through a series of 'jumps' to get to Egypt - by the time Ron finally reached Bill, an hour after reading the letter, he had Apparated 27 times. he says, voice forcibly clam because one of them has to and clearly it wasn’t going to be his brother. - To his younger siblings, Bill is the epitome of 'cool', 'calm' and 'chill' and panic is something he just doesn't do. At the same time, Bill only keeps his calm because he knows that it won't help if everyone is panicking at the same time. Privately, Bill has like zero chill and constantly freaks out about his family's antics. and Bill guessed, because it was Charlie and it wasn’t the first time something like this had happened - it had probably been too much to hope that this particular habit wouldn’t pop up at Hogwarts. - smol!bb!Charlie had a tendency to bring home stray animals or injured ones, begging his brothers to help him hide them from their mother "At least until it's healthy!" or "At least until I find it a proper home!" depending on the animal. (Spoiler: Molly was aware of her youngest son's antics, hard not to be when various cats brought home will climb into her and Arthur's bed after Charlie has fallen asleep. She pretended she didn't know, because 'keeping a secret from mom' was a good bonding experience for her children and she didn't mind since it wasn't anything bad - in fact she was proud of her youngest son's big heart and that of the rest of her children pitching in to help him.)
II. Not Written: Smuggling the Dragon: Eventually, the two had to go to Dumbledore for help because they had no idea what to do with a dragon nor did any of the friends they trusted to ask. Dumbledore, for his part, was amused when they swore him to silence- "If they find out about your involvement they'll panic and that won't help anyone," Bill pointed out logically, as if it were the actual reason. No, the real reason is that he and Ron were push overs for their younger siblings and Charlie would give them the cold shoulder if he ever found out that they went behind his back to the Headmaster. - but obligingly swore to never speak of his involvement. Dumbledore in turn went to Newt Scamander for help who was the one to jerry-rig a harness to carry a dragon that Bill and Ron used to smuggle Norberta from Hogwarts to the Scamander family home. After the Smuggling: Charlie sent his brothers letters, lots of them, to make sure that Norberta was safe and happy. Ron made the mistake of mentioning Newt's involvement and was subjected to a series of letters that were basically "WHAT HOW WHEN DO YOU STILL TALK TO HIM CAN I MEET HIM?!" and Ron eventually, during a visit to get a progress report on Norberta, begs Newt for a autograph to send Charlie. Meeting Harry: Unlike in canon where Ron met Harry due to the seating of the Hogwarts Express, Charlie met Harry because of Hedwig. As in his family was on their way to the platform when he saw Hedwig and just had to see her up close, so Harry's introduction to Charlie was like, "Hi, I'm Charlie. Your owl is beautiful, is it a boy or girl? I want to say girl but I never really studied owls that much - let alone Snowy Owls. What's their name? Do you think they'd let me pet them? I have some owl treats on me, is it alright if I gave them some?" Befriending Hermione: Their friendship started quieter and, in a way, kinder. Charlie didn't really know Hermione at first, sure he saw her in the library whenever he got the urge to look up this creature or that and sure she sometimes helped him in class and he thanked her each time, but to him she was just a girl in his class. A casual acquaintance that really had nothing to do with him beyond classes. Then, in early October, he came across Hermione in a dark corner of the library fighting tears because she had thought things would be different now, that she wouldn't be alone when there were others like her - others with magic who had weird things happen around them - who she might befriend, that she'd be able to write her parent about all the amazing things she learnt and the friends she made. Instead, she was faced with an entire fourth of the school population who hated her for no reason she could help and she was trying to deflect questions about friends from her parents - steadily writing less because she hated lying to them and how their questions emphasized how friendless she was only that didn't help either because she missed her parents and now she had no one. Charlie stumbles across Hermione nearing tears and she glares at him defiantly, because what's one more person making fun of her?, and he suddenly remembers Ginny- his little sister who came into his room the night before he left for Hogwarts, crying because now she'd be alone with all her brothers gone - and he knows he can't just walk away and pretend to have never seen this. So he doesn't walk away, he sits next to the fellow first year Gryffindor whom he sees in the library and helps him in class and opens the book he had came to the library for - about the Welsh Green breed of dragons - and Charlie reads aloud. He doesn't say anything, just reads about Welsh Greens until they have to head up to Gryffindor Tower before curfew. And Hermione is grateful, even if it's a one time thing borne from pity. Only Charlie comes back, each day following the first he sets out after dinner to find her and then he takes a seat next to her and reads whatever book he has with him. They finish the book on Welsh Greens, then one on Hippogriffs and are mid-way through one about Phoenixes that Hermione finally manages to draw up her courage to ask, "Will...will you be my friend?" She shrinks back when he laughs but is overjoyed when he finally says, "Eh? But I thought we were friends already?"