Harry's years at Hogwarts brought him in contact with several fellow students and they all left their impact, whether small or large. While these folks weren't on the same level as Hermione and Ron or even the silver trio of Neville, Luna, and Ginny, they had their own integral part to play. Some would become allies, some would-be enemies, some would be something in between. And isn't that like most classmates? Someone you can joke with one minute with and the next be arguing over what direction the project should go. Sometimes it's not the friends or the bullies you remember most, it's the ones who show up when you least expect it that leave the strongest mark.
Hannah Abbott
Hannah Abbott-Hannah was born in 1979-1980 to a mixed marriage of wizard and muggle. While her father's line was one of the Sacred Twenty Eight, her mother was either a muggle or perhaps muggle-born, since Hannah was listed as a half-blood. Hannah was quite a wide-eyed one when she arrived at Hogwarts, being soon sorted in Hufflepuff and falling under Ernie's benign leadership. In fact, she tended to be quite the follower, or perhaps she just wanted her time at Hogwarts to be quiet. She allowed Ernie to sway her when her own instincts told her that Harry might be innocent and she let house pride turn her into a bit of a bully with the "Support Cedric" badges. But when left to her own devices, Hannah could be quite good.
However, it's not surprising that she would look for a bit of leadership. She had a tendency to be anxious to the point of needing a calming draught. In fact, leave it to her to see the potential pitfalls of any sort of action. Sure, she joined Dumbledore's Army, but it was only after she pointed out how dangerous it would and how much trouble they could be in. But when she trusted her instincts, she could avoid her nerves and be able to help out her friends. In fact, anxious Hannah was even able to help Harry fight off Draco and his gang near the end of their fifth year.
Two tragedies would end up shaping Hannah's life. The first was Cedric Diggory who had been a friend as well as a hero to the Hufflepuff house, and then the tragic murder of her own mother almost a year later. While it's unknown why her mother was killed, it's only reasonable to assume that it was due to Voldemort's rise and her mother's muggle nature. She went home for her mother's funeral and wouldn't return until the next year. And yet, despite the next year, Hogwarts was under the Carrow's cruel thumbs, she was emboldened somehow. She would join Neville in his revived Dumbledore's Army and become one of his trusted captains if you will. I would daresay based on her skill in herbology and later career choices that she was the main medic for the little revolution, especially if you recall how many students suffered beatings or Cruciatus curses. She would even remain to fight in the Battle of Hogwarts. Hannah Abbott seemed to be following a journey similar to Neville, where both of them came into their own strengths and in discovering themselves, found a bond with each other. One could almost imagine the late-night plannings evolving into late-night discussions and hopes for the future. And eventually, that blossomed into blushing smiles and coded messages using herbs and flowers they could salvage around the Carrows and other dark wizards at Hogwarts. While I doubt either had time to think of romance in those dark days, in the recovery period after, they found a way to use their bolder personalities to confess to each other.
After the war, she went on to pursue other passions. A dedicated Hufflepuff, she went on to become the owner of the Leaky Cauldron for a time, which was also her and her new husband Neville's home. And for a time, that suited them both fine. In fact, it even raised Neville in the eyes of his students, as many of them thought it was cool that he lived above a pub. However, whether it was missing her husband while he worked at Hogwarts or wanting to be more involved with the next generation or even both, she would leave the pub after some years. This time, she put her herbology skill and previous experience in Dumbledore's Army to use, pursuing the career of a Healer. Once she graduated from the course, she applied and was accepted to be Hogwart's new Matron, after Madame Pomfrey finally retired. While it's unknown whether or not they had children of their own, considering Neville's parents and her own mother, it's almost certain that they treated the students as pseudo children of their own. Just as it's almost certain that there was an extra calming draught next to the teapot in their little apartment at Hogwarts. After all, OWLs can be quite stressful for teachers as well as students.
Colin Creevey
Colin Creevey-Colin was born sometime in 1981 to an ordinary muggle family as the oldest of two boys. Much to the family's surprise and delight, both boys turned out to be wizards and Colin was the first to attend Hogwarts in 1992, being sorted quickly into Gryffindor. And he was everywhere, complete with a camera like a muggle paparazzi. To Harry's annoyance, Colin found out quickly how famous he was and practically trailed after him everywhere, peppering him with questions and even asking for an autographed photo. To be fair, he was more than an overeager hero worshipper (though he was very much that). He was also surprisingly clever, having learned how to make moving photographs in only his first year. It also proved that his fascination with photography was more than just recording events. The actual art of it had already captivated his attention almost as much as magic and Harry Potter had. His camera would also prove to life-saving as the lens of it protected him from the full effect of the basilisk attack. A basilisk attack that he only suffered because he was trying to sneak into the hospital wing to see Harry. Clearly curfews and restrictions were only suggestions to young Colin.
If you thought being attacked by a basilisk as an eleven-year-old would dampen his enthusiasm, you would only be partially correct. While his following years were quieter, he and his camera were still a constant presence around the school. And he would still admire Harry if with a slight (very slight) more distance. When his brother came two years later, he was proud and excited. After all, he had been sending photos home to his family, trying to share as much as possible of his new world with the people he adored most. Now one of them was actually coming to join him. By all accounts, the brothers didn't get into nearly as many squabbles as the Weasleys did. Colin never shied away from being around his little brother as many older siblings did, even trying to work with him to change the "Support Cedric" badges. Unfortunately, badges are not the same as camera film, so it was a failure. Clearly, his cleverness had to be focused and channeled.
That would only be more true when he joined Dumbledore's Army under Harry. While he was smart enough to remember to leave his beloved camera behind for the secret meetings, more than one student described him as erratic, letting his excitement over learning new magic overtake actually focusing to cast things correctly. Still, he did manage to do more than just knock books off of shelves, managing several simple jinxes and curses after only a few meetings. He may have also been a bit scattered brain, as when Hermione first called the DA members through the coin, he didn't show, most likely due to losing his coin. After all, he was sorted into Gryffindor, the bravest house, it's unlikely he would have cowered out then. Especially if he would have believed Harry needed his help.
When the Carrows took over Hogwarts, he and his brother were expelled and went into hiding, due to their muggle-born status. But Colin kept close enough to keep up with at least some of the news and happenings. And he was brave enough to respond to the call to defend Hogwarts in the battle, despite being under-aged. After all, if a basilisk was not enough to deter him from sneaking around, then neither would Death-Eaters be. Colin Creevey is listed among the Fallen Fifty, as one of the defenders who died. Even Harry, who had been generally annoyed by the boy's presence, mourned him. Colin may have been annoying, but he was loyal and trusting. Never once did he doubt Harry's innocence, and he always believed he would save the day. In his innocent way of thinking, he may have even though his death was worth it. Not only did he live up to Gryffindor's standards of defending justice, but he also gave his life in honor of his lifelong hero, Harry Potter. It is hard to wonder what he could have become had he actually grown up and become a bit more mature. Between his curiosity, nose for sneaking around, and his photography skills, he could have been a brilliant photojournalist. Unfortunately, bravery comes at a high cost.
Pansy Parkinson
Pansy Parkinson-Pansy was born to a pureblooded Family sometime in 1979-1980. The Parkinsons were not only part of the Sacred Twenty Eight, but they also had the distinction of one ancestor, Perseus Parkinson, being Minister of Magic at one point in time. So Pansy, at least to her reckoning, was born into the 'right' side of the Wizarding World. A belief that certainly had to be further solidified as she would be sorted into Slytherin. Certainly, she felt proud enough to look down her nose at anyone who was not a 'proper Pureblood' or not from Slytherin. While she felt cozy enough with her own housemates, including Draco Malfoy, everyone else she belittled, teased and tormented. It certainly took her no time to live up to the reputation of Slytherin, albeit the more disfavorable one. And she rose up the ranks, both socially and in the school hierarchy. Not only was she was queen bee in Slytherin house, head of her own sort 'of 'girl squad', she also became Prefect and part of the Inquisitorial Squad. She was even involved with the ending of Dumbledore's Army, as it was she who uncovered the list of members. By all standings, her star was burning bright.
So how does a star fall? By ending up on the wrong side of history. In all of her search for power, she chose the most nebulous source of power - social standing. And while she was in school, that was perfectly okay. She could bully and charm people by turns and maintain her power. But when she became older and had to maintain that power outside of school, she lacked the tact and foresight necessary to keep it. She may have wanted to be Narcissa Malfoy 2.0 but she would fail in that endeavor. And she lacked the strength to be more like Bellatrix. She was cruel to others like her and fiercely loyal to Draco. But she was a fairly average witch and more focused on charms that affected her looks than proper fighting hexes. All of her attention was focused on one path. Becoming the wife of Draco Malfoy and raising more little wannabe Death Eaters to the cause. Maybe she would have some influence on some bigoted policy, but mostly she would be the perfect social society wife. A good enough plan perhaps, but she should have paid more attention to what was actually happening, or at least the people she was with.
One could even pinpoint the moment her star fell. As Lord Voldermort approached, calling out for Hogwarts to turn over Harry Potter for leniency, she thought she saw her chance to raise higher. And yet, the moment she cried out "What are you waiting for? Someone grab him." She domed herself. To almost a person, every single student from Hufflepuff, Ravenclaw, and Gryffindor turned their wands on her. In fact, she had been the only one to say it. There may have been other Slytherins who thought it, but they must have been more aware of their surroundings and how much smaller of a group they were. Any who might have joined her was silenced by the sight of so many wands. Instead, they followed Pansy out when Professor McGonagall dismissed them. And that seemed to be the last time they followed Pansy's example. After the war and Draco's change of politics, she lost her favor with him, as he ended up marrying the younger sister of one of her friends, Astoria Greengrass. And Pansy, set to be the darling of the new world society born out of Voldermort's war, fades into obscurity.
Oh, it's reasonable to assume that she still married a proper pureblooded wizard, attempting to instill proper pureblooded politics into her own little witch or wizard. To what few social events she would be invited, she would be pushed to the edges of, her shrill voice ringing loud enough to annoy the hosts. But she is one of those unfortunate souls to have peaked in high school, forever glued to her glory days when she was not much more than a child herself and pushing her child to fulfill what dreams she lost. She is more than likely the one staring at the pile of mail, claiming loudly to the family that their invitation must have been lost, these house-elves are so terrible at their jobs, and all of them would know the truth. It's almost tragic when you think about it. A tragedy she made for herself, but one all the same.
Ernie Macmillan
Ernie Macmillan-Ernie was born to a pureblooded family around 1980, though not clearly linked with the Sacred Twenty Eight. (He might have been related to Sirius Black though a shared relative, though it is inconclusive). Either way, while he was proud of his family's lineage, it wasn't because of blood. His two closest friends in Hufflepuff was Justin Finch-Fletchley (muggle-born) and Hannah Abbott (half-blood). But there were still plenty of ways that it would show through. For one, he was the sort of natural ring leader for his group of friends, such as telling Justin to hide in the dorms to avoid the Heir of Slytherin or convincing his fellow Hufflepuffs to turn against Harry during the Triwizard Tournament (not that the Hufflepuffs needed much convincing). This natural leadership led him to be Prefect of Hufflepuff, a role he certainly fit into like a glove.
But it was not just leadership that Ernie inherited from his pure-blooded background. He could also be a bit pompous, quite almost by accident really. He never intended to brag..much. But he had a way of speaking that could border on verbose at times, such as when he talked about his study habits or convincing Hannah to turn against Harry Potter in their second year. And most certainly, if he heard something or decided something was true, then not much would change his mind. Nothing had shaken the fact that he thought Harry was Heir of Slytherin until Hermione had been petrified and practically immediately, he accused Draco. Not to mention, everything he did had a bit of publicity about it. It wasn't enough to apologize to Harry, it had to be done publicly. It wasn't enough to just agree with Harry about the return of Voldermort, it again had to be public. Quite frankly, there's something of an orator nature about Ernie, both good and bad. He was always up to date on the gossip, could talk your ear off about any inane topic, and don't disagree with him for your own sanity. He would pursue convincing you like it was the last act on earth.
And yet, before we chalk him up as all talk and no action, he could quite well back up his words. He was perhaps the only other student who could actually keep up with Hermione's levels of studying, often putting in a full work day's load or more. And his hard work certainly paid off. Despite Snape's grading scale, he actually was able to graduate to NEWT level potions, among others. And he was not afraid of being wrong. As I said, he was very quick to apologize to Harry when he realized he was NOT the heir of Slytherin. And he was no cowering scholar in the corner either. In fact, it's well recorded that when McGonagall was evacuating the school, he was the first one to directly ask her about staying behind in order to fight. And why not? He had already spent much of the year helping Neville rebuild Dumbledore's Army (of which he had been an original member) and freeing fellow students from detention, for which he must have certainly faced punishments and beatings. He may have had pompous airs, but he well earned the right to be pompous.
Not much is known about him after the Battle of Hogwarts, but I imagine someone with his talents and charms certainly didn't fade into the wallpaper. More then likely, he got a job at the ministry, where he promptly fell into the Wizengamot. After all, he was practically built to be a lawyer or judge, though one hopes he slowed down jumping to conclusions in order to practice fairly. Or perhaps he worked under Hermione when she later was elected Minister of Magic herself, the two did get along well enough and he was intelligent enough to keep up with her. In fact, since he could be more charming then Hermione, she would've been wise to select him to be one of her assistants and handle the more 'mundane' conversations. In turn, he would certainly keep her up to date on all of the office gossip. Either way, Ernie is destined for great things and he will be glad to tell you all about them.