Prototype Unit Number Nine, colloquially known as Pine, is a remarkable creation borne from the genius and instability of the magical researcher, Grinda Elweather. Conceived as a pivotal element in a grand defense strategy for Nivalia against the aggressive forces of Everbloom, Pine epitomizes the concept of a sentient war machine - a construct designed with an unwavering determination and a ruthless capability to safeguard Nivalia’s borders.

However, Pine’s inaugural activation marked the onset of a tragic accident, grievously injuring its creator, Grinda. This incident became the first profound experience for Pine, witnessing the gradual ebbing of life from the very person who breathed life into it. Faced with this harrowing scene, Pine’s inherent programming took an unforeseen turn. A mechanism initially engineered for destruction found itself striving to preserve life.

Pine’s efforts culminated in a partial success, managing to fuse Grinda’s soul with its own core. This fusion fundamentally altered Pine’s existence and purpose. It chose a path divergent from its original design - to protect rather than to destroy. This decision rendered Pine not just a guardian but also a vessel for Grinda’s essence, ensuring that it would never be alone.

Yet, this amalgamation was not without its complexities. Grinda, perceiving Prototype 9 as a failure, instilled an eternal conflict within their shared existence. Both entities, now bound together, were destined to exist in perpetual internal strife, a testament to Grinda’s design for their eternal nature. Pine, thus, embodies not just the pinnacle of magical and mechanical fusion but also the paradox of coexisting divergent ideologies - a protector born from the womb of warfare, perpetually housing a dualistic soul.