Highschool DxD:Frostborn Devil

In the grand library of the Gremory estate sat a 13-year-old boy with long, snow-white hair. He was reading an old tome , his ice-blue eyes scanning the pages with an intensity that no one had ever seen in him before. This boy was Alexander Gremory, the son of Sirzechs Lucifer, the Crimson Satan, and Grayfia Lucifuge, the Silver-Haired Queen.

Many would think that being the child of two legendary war heroes would be filled with admiration, privilege, and endless opportunities. But that was far from the truth.

When Alexander was born, a scandal erupted within the Underworld. His appearance was nothing like his parents. His snow-white hair, a stark contrast to his mother's silver and his father's crimson, was the least of the problems. The most shocking revelation was that he had no magical power whatsoever. The son of the most powerful Devil King and Queen was born with nothing but an empty, dormant magical core.

The whispers began almost immediately. Some even suggested that Alexander wasn't Sirzechs' son, that Grayfia had cheated on him—fueled by the jealousy that often plagued highborn families. This rumor created a rift between his parents, which made them neglected him even further.

Things only worsened when his aunt, Sirzechs' younger sister, was born two weeks later. With her fiery red hair and a massive pool of demonic power that rivaled her brother's, she was seen as the true heir to the Gremory family. She possessed the Power of Destruction, a gift that made her an immediate favorite. As Rias grew, so did the focus on her, leaving Alexander forgotten—a mere afterthought.

Even the servants, who should have cared for him, looked upon him with disdain. Why bother with a weak, powerless child when they could care for Rias, who was destined to become something great? The infant Alexander, with his ice-blue eyes and fragile frame, was often left alone in his room, ignored and abandoned. His cries for attention fell on deaf ears.

A test was eventually conducted to confirm that Sirzechs was indeed his father. The results came back undeniable, but it changed nothing. Alexander was still the forgotten son.

For six long years, Alexander tried desperately to gain the affection and approval of his parents. He yearned for their love, something he had never experienced. Even the servants, who were supposed to be his caretakers, paid him little attention, offering only the bare minimum—food and shelter. By the time he was five, they had stopped bathing him altogether, leaving him to fend for himself.

The more he tried to impress them, the more it became clear: nothing he did mattered. No matter how much he accomplished, no one ever noticed. The Gremory family's eyes were always on Rias, the spoiled princess, who would receive praise for even the smallest of things, like tripping over her own feet.

At the age of six, Alexander stopped. He stopped seeking approval, stopped chasing a love that would never come. He grew cold. He became distant. He realized that no matter what he achieved, no one would ever care. And so, he retreated into his own world.

The library became his sanctuary. There, he immersed himself in knowledge—magic, history, runes, and ancient texts. With no one to teach him, he taught himself. And slowly, the boy who was once invisible began to grow into something far stronger, colder, and more powerful than anyone could imagine.

Five years ago, at the age of eight, Alexander made a discovery that changed everything.

Through deep meditation—something he had read about in an old tome—he sensed something within himself, something hidden. His magic wasn't nonexistent. It was there, buried deep, sealed away. He realized that at birth, his magic power had been so immense that his own body couldn't handle it. To protect itself, his magic had instinctively sealed itself away, making it appear as though he had no power at all.

For the first time in his life, Alexander felt hope. But he was no fool. He didn't run to his parents or his family with the news. Why would he? To hear them make empty excuses? To watch them pretend they hadn't ignored and abandoned him for years? No, he would not give them that satisfaction. Let them keep their hypocrisy.

Instead, he made a decision. He would grow stronger on his own.

From that day on, he dedicated himself to studying magic in secret. While Rias was pampered and praised, Alexander spent sleepless nights in the library, absorbing every piece of magical knowledge he could find. Runes, ancient spells, elemental control—he devoured it all.

He was alone, but he would make sure that when he revealed himself, the world would never ignore him again.

Through years of relentless training, Alexander uncovered the true extent of his potential—far beyond what anyone could have imagined.

His bloodline was not lacking. In fact, it was unparalleled. He had inherited the Cryokinesis of the Lucifuge, the very ability that made his mother's clan legendary. He possessed the Power of Destruction from the Bael bloodline, just like his father and Rias. And from the Gremory lineage, he gained an immense mana pool and incredible magic control, allowing him to wield his abilities with terrifying precision.

Among them all, it was his ice magic that he favored the most. Unlike the raw destruction of the Bael, his cryokinesis was elegant, controlled—absolute. With a mere thought, he could freeze the air around him, sculpt weapons from solid ice, or encase entire rooms in an unbreakable frost.

With his genius intellect and relentless training, by the age of 13, Alexander had already reached the level of a mid Ultimate-Class Devil—a power unknown to anyone.

While his family pampered Rias, believing her to be their only prodigy, Alexander stood at the threshold of greatness, unseen and unstoppable.

Right now, Alexander sat in the quiet, dimly lit corner of the library, his long snow-white hair cascading over his shoulder as he leaned over an ancient tome on swordsmanship. His ice-blue eyes flicked through the pages, absorbing every detail with the same intensity and focus that had shaped his magical abilities.

While most would assume that a young devil like him would focus purely on demonic powers, Alexander's thirst for knowledge extended beyond magic. He had realized that strength wasn't just in the arcane arts—it was also in the physical mastery of one's own body. Swordsmanship, with its discipline and precision, intrigued him.

The book he studied was old, its pages yellowed and cracked from age, but its contents were invaluable. It detailed advanced techniques of combat, the ways a blade could be wielded with both elegance and lethal force. Alexander, with his genius intellect, grasped the concepts quickly, envisioning the moves in his mind, feeling the weight of the sword in his grip.

Though no one could see him, he trained in his mind, imagining the movements, perfecting his stance. He would become more than just the forgotten son of Sirzechs and Grayfia. He would be unstoppable—an immortal force of his own making.