To answer a few questions:
They grew up with the Longbottoms and the Woods and the Scamanders; of course they're friends. They could hardly reject their friendship because of who their parents are; that would go against everything Legacy stands for. However, they do have others – Lucy's got her own Slytherin friends; Dom hangs out with her own Gryffindor friends, although generally, the Quidditch Team are very close. There are the Pryces, too, and they aren't enemies with Scorpius – rather, they've got the Riddlers and Boris Morris and Miles Corney for their own reasons. They don't care if their friend circles resemble their parents' or not. Not only do they want to escape that legacy and create one of their own, but they also want to make sure that things like that aren't affected by their parents. "Oh, our parents hated this family, we can't be friends" and so on.
Also, Lily/Scorpius just doesn't feel right to me. I'm one of those people who firmly believes that J.K. was giving us clues to the future pairing of Rosius.
As for the Heads of House, I've seen a lot of controversy in new-gen fanfics regarding how they are chosen – whether by professor or position – but in the majority of them, it seems to by position. Professor Bones is Susan Bones, who was a Hufflepuff, but as Transfiguration teacher she's Head of Gryffindor House. I was just trying to go by majority, although personally, I think the other way makes more sense – after all, as a Hufflepuff, she should technically be cheering on the Hufflepuffs. Ah, well.
Disclaimer: This world and these characters belong to J.K. Rowling. The only thing I own is the plot.
Al Potter was going crazy. Here they were, at King's Cross Station, about to be sent off to Hogwarts for another amazing year – he really should be jumping for joy.
But Lily wouldn't shut up about how great it was going to be, and how she couldn't wait to start learning magic (legally, that was, but the adults didn't need to know that). Al noted with mild indignation that James hadn't said a word to Lily about getting sorted into Slytherin. That was to be expected, however – James and Al were quite close, although James was never afraid to mess with him constantly, but the sort of fierce protectiveness the brothers felt towards Lily ensured that only the very mildest of mild teasing was allowed towards her.
And that meant that James couldn't quite bring himself to see the extreme joy leave his little sister's face by having her worry about her House. Truthfully, he needn't have worried – Lily was about as scared of her sorting as she would be of a pygmy puff.
Al impatiently scanned the crowd for Rose, Scorpius, and Alice. As third years, the Hogsmeade privilege permission slip had come home, and his dad had actually demanded to see it so he could sign it – Al hadn't even had to ask. Considering his dad's experience with the form, though, Al could see why this was. He wasn't complaining, anyway. He was extremely excited at the thought of being able to go to Hogsmeade (again, legally, though the adults didn't need to know this, either – although, hadn't his father done the same thing in his third year? The hypocrisy of scolding them for doing the same thing wouldn't be lost on them).
Suddenly, he heard an enthusiastic voice scream, "AL!" A moment later, he was attacked from being. Staggering forward a few steps, Al turned as the person let go of him, grinning madly.
"Alice!" He smiled at her. "Have you seen Rose or Scorpius?"
As if on cue, Scorpius appeared behind him. "Al! Hey, Alice." Alice promptly hugged the life out of him as well, while Scorpius struggled to breathe, scowling at Al over Alice's shoulder as Al smirked at him.
"I've seen you for two seconds and I'm already bruised," Scorpius complained. He had had a massive growth spurt over the summer, and already had an inch or two on Al's dad – who, Al had to admit, wasn't very tall at the height of five and a half feet – both his sons were already taller than him. It seemed Rose, who was exactly at eye level with Al's dad, was no longer the tallest of their group.
Alice hadn't managed to grow past her five foot self, but she managed to make up for it with her extreme exuberance and monstrously sarcastic attitude.
"My, my, look how you've grown," said another voice from behind them, and they turned to find Rose grinning at them, looking slightly out of breath. "Hey, Alice. Scorpius! Bloody hell, you're taller than me." She hugged him, grinning at Al. "I haven't seen you in a month. How was Nice?"
"It was great! I've finally picked up enough French to keep up with Vic, Dom, or Louis – or you guys, I guess. It was really hot there, though. What took you so long to get here?"
"Hugo," Rose answered in irritation. "He forgot his trunk. How do you forget your trunk? He even had his wand in there!"
"I was preoccupied!" Hugo said defensively from behind her.
"Honestly, Hugo," Rose sighed in a manner reminiscent of their mother. Only her Al, Scorpius, and Alice recognized the mischievous gleam in her eyes as she took a page out of James's book. "Where are you going to put your Hufflepuff robes if you haven't got a trunk to store them in?"
Clearly aggravated, Hugo screamed, "I will not – be – a sodding – Hufflepuff!" Apparently they had been over this many times.
"So you say, little brother." Rose grinned. "So you say." Really, everyone knew Hugo was destined to be a Gryffindor – he was just like his father.
Scorpius and Alice gave her amused expressions, while Al gave her a look. She shrugged and looked up as the Malfoys, Scamanders, Woods, and Longbottoms neared the Weasley-Potter group. Rose casually threw her arm around Scorpius's shoulders and waved at Draco Malfoy, whose eyes narrowed. Clearly his son hadn't come to his senses yet about picking good friends. (He had once mentioned this to Scorpius, who had retorted, "Because Crabbe and Goyle were such gems, right Dad?" Draco had refrained from mentioning this to Scorpius again and instead quietly hoped that he would see reason some day.)
As their parents exchanged greetings and turned to wish their children goodbye, Rose's father gave her a pained expression. "Rose, you'd better win the Quidditch Cup this year. Or I'll disinherit you."
Her mum nodded, whispering in her ear, "Love, you can't lose to Slytherin again. You're Gryffindors! Quidditch Cup, House Cup – they're both yours, you understand? So if I hear that you lost either because of some harebrained adventure you've gone off on, I'll force you to clean the entire third floor after a family get-together, got it?"
Rose paled. The third floor of their house was the one with all the guest rooms, and she did not fancy being blasted in the face with another one of Fred's WWW firecrackers. Besides, she couldn't bear the shame – her first year had been the first year Gryffindor had lost the House Cup in over a decade. That year, Captain Lucy Weasley carried the Slytherin team to victory by winning the Quidditch Cup for the first time during her captaincy, and the second time during her career on the team. The first time had been in 2015, breaking Gryffindor's beautiful streak of Quidditch Cups year after year almost incessantly since Harry Potter had played for their team as Seeker. Then, in Rose's second year, Lucy had managed another Quidditch Cup win, although Gryffindor secured the House Cup.
This year was Lucy's last year, and she was determined to win both the House Cup and Quidditch Cup for Slytherin (although obviously, as Captain, she felt Quidditch was more important) in a final blaze of glory before her run at Hogwarts was over.
Of course, it was Dom's last year as well, and as the Gryffindor Captain, she was just as determined to win the Quidditch Cup (and House Cup, although that wasn't her main concern) for Gryffindor one last time during her captaincy before she graduated, maintaining the legendary status of the Gryffindor Team as so many captains before her had.
They all boarded the train, and Al, Rose, Scorpius, and Alice found their usual compartment. It was a historic one for them – the compartment where the Golden Trio first met, the compartment where they had found JP+LE and Long Live the Marauders scratched into the wall, and the compartment they had first sat in as first years.
They eventually fell asleep, having stayed up late the previous night at an impromptu Legacy meeting; the first years couldn't contain their excitement at the prospect of being Hogwarts students.
After all, Hogwarts for regular witches and wizards was a place where lifelong friendships were made, couples first fell in love, and one's most cherished memories were held. For them, it was all this and their opportunity to leave behind their own legacy before they moved on to the wizarding world and stunned them all by being unforgettable.
"Anything from the trolley –" the old witch broke off as she stared at the four friends inside the compartment: Alice resolutely lying across her own side, Al sprawled across another with legs as a pillow, Scorpius stretched halfway across the other side with Rose curled up beside him, one hand lazily thrown over him.
She smiled to herself at the lovely picture – she could remember back generations; to the time of these children's parents, and their parents' parents, compartment after compartment of people like these. It was part of why she loved this job.
Filled with nostalgia, the witch continued on to the next compartment.
Scorpius was the first to wake a half hour later, his stomach grumbling. As he shifted, Rose made an irritated noise and opened an eye, frowning. "I'm famished," he told her. "Aren't you?"
"I am," came Al's voice sleepily as he sat up. "I'm going to go find the trolley witch."
"I'll come," Rose and Scorpius said in unison. Scorpius looked at Alice. "Alice?" he asked, shaking her. She scowled and turned away, muttering in her sleep. Leaning over her, Scorpius repeated the action. "Do you want any food?"
Alice didn't open her eyes. "No!" she growled furiously. "Leave me alone!"
Warily, Scorpius inched away. "Let's go."
They found the witch quickly enough, intending to buy galleons upon galleons of candy. They were nearing the witch, Rose and Scorpius arguing about whether chocolate frogs or Bertie Bott's Every Flavor Beans were better (Rose insisted that the beans had it out for her, while Scorpius was adamant that they were a true Gryffindor sort of snack, testing one's bravery and all), when Al stopped suddenly.
"Who is that?" he demanded, staring. Rose leaned over his shoulder in confusion. There was a girl, already clad in Ravenclaw robes, buying pumpkin pasties while laughing with her friend, a tiny blonde.
The girl had dark russet locks, tanned skin, and hazel eyes – she was very pretty, Scorpius thought, but he couldn't remember seeing her before. "I think she's in the year below us," Rose volunteered, frowning, "but I don't know her name. Why?"
"I – she –" Al didn't answer, and the girl left without glancing at them.
He stared after her until Scorpius snapped, "Mate! I'm bloody starving here, so if you could get something. . .?"
"Yeah," Al muttered. His gaze fell on the girl's blonde Ravenclaw friend, and his eyes lit up. "Hey! What's your friend's name?"
The blonde turned to him, arching her eyebrows. "How does that concern you. . .?" Her gaze swept the three of them, and her eyes widened in recognition. "You're Al Potter, Rose Weasley, and Scorpius Malfoy!"
"Yeah. And your friend's name is. . .?" Al prompted as Scorpius let out a growl of frustration and addressed the trolley witch.
"Like I said before," the blonde replied smartly. "It's none of your business. Friends don't give other friends' names to strangers who may be stalkers for all they know."
Al's eyebrows rose in protest, but before he could say a word, the girl smiled, pocketing a few sickles. "My name's Jess Brooks," she told him. "If you want to know my friend's name, ask her yourself. I'm warning you, though – she doesn't typically do this sort of stuff."
What sort of stuff? Al wondered as the girl walked away.
"Al!" Rose snapped her fingers in front of his face, and he jumped, letting out an incoherent "huh?" Rolling her eyes, Rose grabbed his shoulder and shoved him forward as they returned to their compartment.
"Lily Potter!" called Professor Longbottom, and Lily stepped forward, catching the Headmistress's gaze as she went. Professor McGonagall wasn't whispering madly, but even the rest of the staff seemed curious as to how her sorting would go.
The hat was placed on Lily's head, and it mused, Hmm. . . ambition, like the rest of your family, but you've also got plenty of cunning. . . you're the sort to notice everything and file it away for later, eh? All knowledge can be turned to your advantage. . . very intelligent. . . not a difficult choice at all, Miss Potter.
And with that, she was sorted into "SLYTHERIN!"
The hall went impossibly quiet, until Lily heard Lucy start to cheer, and the rest of the Slytherin table quickly joined in, roaring applause meeting her as she took a seat. The Gryffindors looked stunned that they weren't accepting yet another Potter into their ranks, and they weren't the only ones.
"Lorcan Scamander!" Professor Longbottom said after several more names.
After only barely a few seconds on his head, the hat boomed, "SLYTHERIN!" Lily's eyebrows went up at that. Two of the new Legacy members in Slytherin, when previously only Lucy had been sorted into the House?
"Congratulations," Lucy told them both, leaning over with a grin. "It's about time."
"Are you disappointed?" Lily asked Lorcan as they watched Xander get sorted into Gryffindor.
He shook his head. "Not at all."
She smiled at him. "Neither am I." Looking over to the Gryffindor table, Lily found both her brothers' eyes on her. James gave her a reassuring smile and shrug, as if to say it was all right that they wouldn't be in the same house. Al smiled sadly at her and nodded, congratulating her. Lily beamed at them – if there was one thing that disappointed her, it was that she wouldn't have her brothers with her. But she knew that if she wanted to make her mark, Slytherin was the best place to go.
"Hugo Weasley!" The hall dissolved into hushed whispers at this name again. The hat hadn't even fully touched Hugo's head before it roared "GRYFFINDOR!" Feeling a stab of disappointment, Lily watched as her cousin proudly made his way to the House of the Lion, welcomed heartily by their family and fellow housemates.
Roxy was sorted into Gryffindor right after him, and then Professor Longbottom called Morgan up. She was a hatstall – the students around Lily looked furious at the hat for taking so long when they had a feast coming.
Finally, the hat declared her a Slytherin – and Lily, Lorcan, and Lucy exchanged considering looks. For the first time, that year's Legacy members were half Gryffindor, half Slytherin. They had three new Slytherins joining the House of the Snake.
Lily smiled to herself. At least she wouldn't be alone.