The Emergence of Shinsha: A Hidden Legacy

Chapter 1: The Unseen Miracle

Two centuries had passed since the Great Tenma War, and the nation of Tempest flourished under the steady hand of Rimuru Tempest, the benevolent yet powerful Demon Lord. Peace had settled over the land like a warm blanket, with every race living in harmony under his protection. But while the world around him thrived, Rimuru, ever curious, found himself lost in his endless thirst for knowledge, fun and experimentation.

In his private laboratory, nestled deep within Tempest's capital, Rimuru meticulously studied magicules, the very essence of his power. Today, however, something felt different. His hands, well, his slime essence, felt an odd shift in the energy as he attempted to fuse various magicule structures together, testing the limits of their potential. He poured in a little more energy, twisting the magicules into a new form, hoping to unlock something unexpected.

As the magic pulsed in the air, glowing a bright pink, a sudden surge of energy erupted. Rimuru reflexively withdrew his aura, startled. Before him, a small, glowing pink slime appeared. Its translucent surface shimmered, and oddly enough, its presence felt familiar, like looking into a mirror.

"What... What is this?" Rimuru murmured to himself, eyes wide in shock. The little slime bobbed softly; its aura peaceful yet undeniably strong.

Just as Rimuru began to investigate further, Ciel, his faithful companion and the embodiment of Wisdom, interrupted his thoughts.

[Master, it appears you have unintentionally created a new lifeform.]

Rimuru froze for a moment. "Wait... what? Created life? How?"

[The magicules you manipulated reached a critical point of resonance. The result is a lifeform similar to yourself. However, the most intriguing discovery is that this being possesses a soul, a soul that has traveled across timelines.]

"A soul?" Rimuru stared at the pink slime, bewildered.

The small creature glowed softly, exuding a peaceful and warm presence. As Rimuru reached out, he felt a pulse, a deep connection between them. It wasn't just a product of magic; it was something more. Something he hadn't expected.

[This creature is, for all intents and purposes, your child, Rimuru.]

"My... child?" Rimuru's voice wavered slightly. It wasn't that he hadn't thought about creating new life before, Tempest had seen many new lives flourish under his rule. But this? This was different. This was personal.

The pink slime wiggled slightly, almost as if recognizing Rimuru's thoughts, its aura glowing brighter for a moment. Rimuru could sense its energy, soft, curious, and pure. And yet, beneath the innocent appearance, he could feel something far more ancient. This being was connected to him, but it also held experiences and memories that no ordinary creature could possess.

"Shinsha," Rimuru whispered, the name coming to him naturally. "That's your name."

[An appropriate choice, Master,] Ciel remarked. [However, this event may cause complications. It would be wise to keep her existence hidden for now.]

Rimuru frowned slightly. Ciel was right. The sudden appearance of a creature with such an aura could easily draw attention, especially from those like the other Demon Lords, always keen on sensing shifts in power.

"Yeah... we need to keep this quiet for now. The others will notice the change in my aura if we're not careful." He looked down at Shinsha, who blinked innocently at him. "I need to protect her."

And so, Rimuru decided. For now, he would keep his new daughter a secret from the world, nurturing her in private until he understood more about her nature. He couldn't risk drawing attention to her until the time was right.