Hikaru Shiina <Legit ✔>

When Tsubasa reached the crater, she didn't find just a ship; she found a monster. A Maguar, a grotesque alien creature, lunged from the shadows. In that moment of pure terror, a strange, glowing energy called a Ribers surged from the wreckage, fusing with Tsubasa’s own body. Together, they transformed into a towering, armored warrior: Figure 17.

Through every battle and every sunset over the farm, Hikaru remained Tsubasa's shadow and her light, a reminder that even in the wake of loss, something beautiful and unexpected could take root. Figure 17–Anime Review - FunBlog hikaru shiina

Hikaru became the sister Tsubasa never had. While they spent their nights hunting the Maguar eggs scattered across the countryside to protect their town, their days were spent learning what it meant to be family. Hikaru taught Tsubasa how to laugh again, her outgoing spirit slowly pulling Tsubasa out of her shell. They were two halves of a whole—one a girl seeking a place to belong, and the other a being born of starlight, learning what it meant to be human. When Tsubasa reached the crater, she didn't find