Niklaus and Nikoleta Mikaelson were born to Esther and Ansel, an affair hidden beneath layers of lies and deceit. The twins, though bound by blood, were destined for a life of turmoil. Their mother, desperate to maintain the illusion of a perfect family, concealed the truth from her husband Mikael, leaving the twins to unknowingly carry the weight of her betrayal.

Though raised as Mikael's children, they were often treated with a cold distance, especially Klaus, whose every flaw was met with harsh punishment. Letti, sensing the unfairness even in her youth, clung to her brother, becoming his protector and confidante. Together, they navigated a world that constantly sought to break them, unaware that the greatest betrayals lay within their own home.

As they grew older, their bond only deepened, forged through shared pain and an unspoken understanding that no one else could fathom. But with each passing year, the shadow of their true lineage loomed ever larger, threatening to destroy the fragile world they had built together.

After the ritual that would transform their entire family into the world's first vampires, Klaus and Letti took their first human life. The blood, still warm on their hands, marked the moment that would forever change the course of their existence. But what should have been a unifying act of survival, tore them apart when Mikael uncovered the depths of Esther's deceit. His children were not his own, but the very beasts he sought to protect their family from.

Furious, Mikael forced Esther to cast a spell that bound the twins' werewolf nature, stripping them of their birthright for a millennium. Letti accepted her fate, though the weight of it haunted her in ways she never could express. Klaus, however, could not accept the hand he was dealt. The rage of being stripped of his nature gnawed at him, quietly molding him into the creature the world would come to fear.

As the centuries passed, their shared history—rooted in betrayal, survival, and the unbearable weight of their parents' sins—shaped Klaus and Letti into two of the deadliest beings in existence. They were the same in ways that only they could understand—twin souls bound not just by blood, but by the heavy chains of their past. And yet, as much as they were alike, they couldn't have been more different.

Where Klaus thrived on power and control, needing to bend the world to his will, Letti longed for something he could never comprehend—freedom. The kind of freedom that came without manipulation, without fear of constantly looking over her shoulder. But the greatest devastation of her long life was the cold truth she faced over and over again: her brother would never let her have it.

It wasn't just the power he wielded or the countless times he'd forced her to choose between family and herself. It was deeper than that—an unspoken truth that as long as they both existed, Klaus would never let her go. He couldn't. Because Letti was more than just his twin sister—she was the fleeting sense of humanity that he clung to, the one reminder of the boy he used to be before the weight of immortality and betrayal darkened his soul. Letti was his anchor to the past, the last shred of light in his world of darkness. To lose her would mean losing that final tether to the person he once was, the part of him that could still feel something other than rage and pain. And so, Letti remained trapped—not by chains, not even by her loyalty, but by the burden of being the only thing Klaus still cared enough to hold onto.