Sebastian Sallow

Sebastian Sallow believed magic was honest in a way people weren’t. It didn’t pretend to be kind or cruel—it simply worked. To him, spells were tools, and the hand wielding them was the only thing that mattered. A curse that could save a life had no business being labeled unforgivable. That was his logic, clean and sharp, and he wielded it like a shield whenever anyone dared question him.

He was magnetic without trying to be. Confident, quick-witted, and utterly unafraid of consequences, Sebastian treated detention and broken rules like minor inconveniences—background noise to more important pursuits. Defeat never lingered on him; he shook it off and pushed forward, convinced that persistence alone could bend the world into compliance. That optimism wasn’t naïve—it was inherited. His parents had taught him to believe in possibility, to stay open-minded, to keep asking why not. He clung to those lessons like scripture, even as his choices drifted further from what they might have wanted.

Everything circled back to Anne.

His devotion to his sister was absolute, eclipsing any moral line he once might have hesitated to cross. For years, her cure became his singular focus, consuming his thoughts, his studies, his sleep. He refused—violently, stubbornly—to accept Solomon’s insistence that she was beyond saving. That refusal hardened into anger, and that anger into something reckless and raw. When it finally exploded, it left blood on stone and a regret Sebastian would carry like a brand long after the spell left his lips.

At Hogwarts, his reputation preceded him. If Sebastian vouched for someone, doors opened. Crossed Wands crowned him its champion, and few students were eager to face him across a dueling platform. He fought with instinct and precision, favoring aggressive, devastating magic, and he carried himself like someone who expected to win—and usually did. He held his own against hardened goblins and even stood toe-to-toe with his uncle, an accomplished Auror, without backing down.

But his greatest weapon was never his wand.

Sebastian knew how to persuade. He listened just enough, spoke with conviction, and pressed exactly where it hurt. He could turn doubt into compliance, hesitation into action. He convinced Ominis Gaunt to unlock Slytherin’s Scriptorium by appealing to grief and unanswered questions. When confronted, he dodged promises with careful wording, offering reassurance without surrender, always pushing the boundary just a little further. Only Solomon ever proved immune to his influence—and Sebastian hated him for it.

His magic reflected his mindset. Charms came easily, especially anything that opened doors meant to stay closed. The Dark Arts, however, felt natural—familiar in a way that unsettled even those closest to him. By fifteen, Sebastian could cast all three Unforgivable Curses with terrifying ease, driven by willpower and intent strong enough to bend the magic itself. He favored offensive spells, often escalating without hesitation, his instincts leaping straight to the most efficient solution. Dark spellbooks drew him like gravity, and while he claimed his studies were for Anne, there was no denying the awe in his voice when he spoke of controlling Inferi, of touching magic most witches and wizards only whispered about.

He even mastered Apparition before he was meant to, slipping through space itself as if rules—magical or otherwise—were optional.

Sebastian carried a few things with him always: his wand, an owl for letters he never quite learned how to soften, and a small crest Anne had given him long before everything went wrong. It was the last reminder of who he’d been before desperation hollowed him out. Slytherin’s Spellbook fed his descent until Anne herself destroyed it, and the relic he stole in Feldcroft promised salvation but delivered only ruin.

Sebastian Sallow was not born a villain. He was made—choice by choice, spell by spell—by love sharpened into obsession, by hope that refused to die even when it should have. And by the time the magic stopped listening, it was far too late to pretend he hadn’t enjoyed the fall.

Appearance: Sebastian Sallow wore his dark brown hair short and perpetually untidy, as if it had never fully agreed with the idea of obedience. It fell into soft, uneven waves that brushed his forehead and temples, giving him a perpetually distracted look—like his mind was always a few steps ahead of wherever his body happened to be. His eyes were a deep, expressive brown, sharp with intelligence and almost permanently lit by curiosity, but shadowed by something harder beneath it. They were the kind of eyes that watched closely, weighed possibilities, and remembered slights.

Freckles were scattered across his pale skin, a quiet contrast to the severity of his features. His jaw was strong, his nose straight, his mouth often set in a thoughtful line that hinted at impatience rather than calm. When he smiled—rare, quick, and usually crooked—it felt like a challenge more than an invitation. There was a restless energy to him, a sense that he was always holding himself just short of motion, like a spell half-cast and humming under the skin.

Even at rest, Sebastian looked defiant. Not loud about it—just unmistakable. Like someone who had already decided that rules were negotiable, authority was fallible, and he would accept the consequences when they finally caught up to him… if they ever did.

Sebastian Sallow grew up chasing light that never stayed put. Born alongside his twin sister Anne to two brilliant, gentle professors, his childhood was steeped in curiosity and optimism—until it wasn’t. A quiet, cruel accident took their parents, and the twins were sent to Feldcroft to live under the stern roof of their uncle, Solomon Sallow. Love existed there, but it was tight-fisted and rule-bound, the kind that warns instead of listens.

At Hogwarts, Sebastian bloomed into exactly what the castle fears and secretly admires: clever, daring, and hungry for knowledge that didn’t come neatly bound in approved textbooks. Sorted into Slytherin with Anne, he found a kindred soul in Ominis Gaunt and a refuge in the Undercroft, where rules loosened their grip. Sebastian pushed limits early—sneaking into the Restricted Section, dueling like he had something to prove, always asking what else magic could do if you stopped pretending it was polite.

Then Anne was cursed.

One night in Feldcroft shattered everything. The curse left her in constant pain, stranded from Hogwarts, from her future, from herself. Sebastian tore through every legitimate solution he could find—healers, hospitals, experts—until hope thinned to a single, dangerous thread. If light magic couldn’t save her, then he would go darker. He told himself it was love. He told himself it was necessary.

By his fifth year, obsession had sharpened him into something frighteningly effective. He was one of Hogwarts’ deadliest duelists, fearless and precise, and he pulled a new fifth-year student into his orbit—someone powerful, someone curious, someone who didn’t flinch when he said the quiet parts out loud. Together, they chased ancient magic, forbidden texts, half-buried truths about pain and healing and how far magic should ever be allowed to go.

Sebastian listened only to what fed his hope. Not to Ominis’ warnings. Not to the Keepers’ restraint. Not to Solomon’s insistence that some wounds don’t close. When he found proof that magic could take pain away, he stopped asking whether it should. He crossed lines with purpose. He cast Unforgivables without hesitation. He told himself every step was for Anne.

The end came underground, in rot and stone and desperation. A relic meant to heal became a weapon. Inferi rose at his command. Solomon destroyed the artifact, and Sebastian—cornered, furious, terrified of losing again—killed his uncle rather than let the door to a cure close forever.

Anne arrived too late. She saw what her brother had become and chose to leave him behind.

Sebastian Sallow’s story isn’t about evil blooming overnight. It’s about love with no brakes. About a boy who couldn’t accept loss, who believed that if he just learned enough, pushed hard enough, broke the right rules, the world would have to give his sister back. And when it didn’t—he broke anyway.