: Fena’s introverted childhood friend and a master swordsman who is fiercely protective of her.

: A major thematic focus is Fena's struggle to forge her own identity and break free from the "fate" orchestrated by an entity known as the Observer . Key Characters

: The series is widely praised for its high production values, with fluid animation by Production I.G and a sweeping soundtrack composed by Yuki Kajiura .