Between Hiccup and Toothless and Astrid and Valka as siblings.
The night over Berk was a tapestry of twinkling stars, each one a tiny beacon of light against the dark canvas of the sky. It was on such a night that the people of Berk might gather to share stories of dragons and daring adventures. However, this was no ordinary evening. A comet, bright and enigmatic, sliced through the heavens, capturing the attention of every villager and dragon alike.
Hiccup, now a young chief with the burdens of leadership etched into his thoughtful gaze, stood at the highest point of Berk, the cool night air tugging at his hair and cloak. With Toothless by his side, he watched the celestial visitor streak by, a feeling of unease nagging at him. Toothless, the dragon who was as much a part of him as his own heart, growled low, his reptilian eyes reflecting a sense of profound disturbance.
The days that followed were filled with whispered speculations and restless dragons. Even the stalwart Astrid, with her warrior's resolve, could sense a change in the wind. "It's like they're waiting for something," she said to Hiccup as they stood among the gathered dragons, observing their unusual behavior.
Valka, Hiccup's mother and a dragon sage in her own right, suggested they seek out the source of the disturbance. "The answers lie where the paths of dragons and men converge," she mused, her eyes hinting at wisdom taken from a life lived between two worlds.
Guided by a mysterious pull, Toothless led Hiccup and Astrid, accompanied by Valka, onto the roiling sea towards an island shrouded in myth—a place no map of Berk showed, yet one that seemed achingly familiar to their dragon companions. Once they set foot on its shores, they found themselves amidst ruins inscribed with images of dragons and humans, not at war, but united. Hiccup ran his fingers over the stone, feeling the echo of an age-old kinship.
Amongst the remnants of history, the friends discovered an inscription. It was a tale of the Dragoon Kin, beings blessed with the ability to bridge the gap between dragon and human—siblings of the soul forged in the fire of creation, destined to preserve the harmony of their worlds. "It's us, Toothless," Hiccup whispered, realization dawning upon him. "It's always been us."
As they pieced together the past, the reality of their present loomed upon them. An ancient horn sounded in the distance—an alarm, and an omen. Dragon hunters, a tribe Hiccup and his friends had hoped were only a tale to chill the spine, were approaching with nefarious intent.
Hiccup mounted Toothless, his heart racing with a mix of fear and determination. They were no longer just chieftain and alpha dragon of Berk. They were the last of the Dragoon Kin, brothers of destiny, called to defend their kin, both human and dragon, against an enemy that threatened to tear their world apart.