The Disillusionment Charm ensured he wouldn't be spotted, and his combat skills meant he could turn the tide in a pinch.
But if Voldemort himself showed up, ready to wreak havoc, Sean would be out of there faster than you can say "Floo Powder."
That said, the odds of that happening were slim to none.
For that to even be a possibility, Dumbledore would have to let Voldemort slip through his fingers.
And, well… that was less likely than Sean facing off against Voldemort in a duel.
For it to happen, Voldemort would need to pull off a few things first. One, he'd have to escape without Dumbledore noticing, so the headmaster wouldn't swoop in right away.
Two, he'd need to find someone who didn't crave the Philosopher's Stone, since he couldn't touch it himself. And getting the stone was his whole goal—otherwise, he'd stay hidden.
The entire first Harry Potter book wasn't so much Harry's growth and adventure story as it was Dumbledore's elaborate trap to catch Voldemort.
From the start, Dumbledore knew Albania was Voldemort's last hideout, and Professor Quirrell had gone there for "research."
When Quirrell returned, sporting that odd turban, he wasn't the same. He'd been off ever since Albania.
Dumbledore wasn't clueless—he'd tasked Snape with keeping an eye on Quirrell.
With Dumbledore in control, Sean had a lot less to worry about.
His main job was to steer clear of Quirrell. Whatever that professor used to be, he was undeniably dangerous now.
No one could predict what a half-mad Tom Riddle might do.
Next, Sean had to keep an eye on the troll. Those were the only real threats a first-year might face.
Oh, and one more thing: don't blow his cover and mess up the plotline.
---
Another morning rolled around.
The corridors were filled with laughter and chatter as young wizards chased each other. Notably, many clutched thick, blue-covered notebooks.
Outside the stained-glass windows, a giant could be seen hauling pumpkins across the lawn, one after another.
Hermione and Justin trailed behind a head-down Neville. Looking at him, Hermione said with exasperation, "Neville, if you don't lift your head soon, that enchanted mirror's going to start yelling again…"
Hermione always had a soft spot for Neville, especially since learning his parents were stuck in hospital beds.
To her, this Gryffindor carried a "don't pick on me, I'm pitiful" label, which made her both frustrated and protective.
"Hey, Hermione, what do you think of the collection?" Justin asked.
"It's… really good," Hermione said, holding a sky-blue notebook. She was about to gush but was cut off by a biting gust of wind.
The corridor was freezing, and all three couldn't wait to get to the cozy fire in the Room of Requirement.
In a quieter spot, Justin suddenly tilted his head, staring intently at a corner. "Sean?" he whispered.
A young wizard's figure slowly materialized in the corridor.
Neville yelped, while Hermione clamped a hand over her mouth.
"Yeah, it's me," Sean said with a nod.
Hermione hadn't noticed him—mission accomplished, and that was enough.
But…
He glanced at Justin and sighed. Caught again.
"Sean, your Disillusionment Charm's getting better… but bring it on! This is the one thing I'll never lose at!" Justin said, a spark of excitement in his eyes as he joined the challenge.
It was like when Sean practiced Finite Incantatem. At first, he couldn't counter Justin's beginner-level Levitation Charm. Now, he could disrupt Justin's proficient-level one with ease.
His progress left everyone in the classroom stunned.
Sean sighed again, then casually knocked on the door of the Transfiguration office.
"Come in, child," Professor McGonagall called.
She was visibly swamped, as if determined to grade every assignment and plan every lesson in advance.
Ever since Sean started tackling advanced Transfiguration, she hadn't stopped being busy.
But no matter how hectic things got, she'd pause when Sean practiced, watching his movements closely, correcting his mistakes, and guiding him in the right direction.
Snape did the same, though his tone was far less patient.
By the time Sean left the Transfiguration classroom, the sky had darkened.
Passing through the corridor, he spotted Harry and Ron lingering by that suit of armor again, surrounded by a gaggle of young wizards.
"It's Sean!" Ron shouted, and the group turned to him with a mix of awe and gratitude.
Gryffindors, Ravenclaws, Hufflepuffs, Slytherins…
Wait, Slytherins?
Sean did a double-take at the kid next to Michael, wrapped in a Slytherin scarf.
"Today's the day the Green Collection first dropped, Sean! We're here to thank you for sharing parts of it!" Ron said, practically vibrating with excitement.
From his shaky explanation, Sean pieced it together.
Justin had quietly compiled a bunch of his notes and, after checking with Sean, released some for free.
He'd hoped the freebies would drum up interest for selling notes in other subjects, but then came a curveball—Ron and Harry.
With access to other subject notes, they'd been racking up points for Gryffindor lately.
Justin's plan hadn't even warmed up before it exploded in popularity.
The notes were snatched up so fast that Justin didn't even keep a copy for himself.
Luckily, only ten copies were released, covering material up to Halloween.
Still, it was enough to give the young wizards a homework-free weekend.
Ecstatic, Ron had rallied everyone who grabbed a free copy to thank Sean, not caring that a Slytherin had slipped into the mix.
As Sean left the corridor, he could barely carry all the candy they'd shoved into his arms.
No wonder Justin had been sneaking extra sweets into his bag today—Sean nearly didn't have enough to return the gesture.
---
In the Transfiguration classroom, a white-bearded old man clasped his hands, smiling. "It seems our Mr. Green is quite popular, doesn't it?"
"Albus, lately… haven't you been a bit too focused on him?" Professor McGonagall said, her brow furrowed, her tone heavy.