Norimasa Hayama, the protagonist’s late father, dies before the story begins, yet his absence lingers as a defining force in her emotional journey, propelling her growth. In life, he nurtured her passion for running, fostering resilience and confidence through shared moments that echoed his lessons on perseverance and self-belief.

His influence extends beyond death through a series of prewritten letters, each arriving at pivotal junctures to guide her. These carefully timed missives reveal his foresight into challenges entwined with sacred traditions of spiritual realms and divine beings, blending pragmatic advice with philosophical depth to affirm his role as a mentor.

Though specifics of his involvement remain unspoken, his connection to ancient rituals and mastery of spiritual customs imply a legacy dedicated to preserving cultural heritage. This hidden lineage bridges her personal struggles with broader mythological currents, intertwining her path with timeless themes.

His character emerges through fragmented memories and the lingering impact of his words, depicting a compassionate, forward-thinking parent whose wisdom transcends mortality. The narrative remains anchored in his identity as a father, emphasizing how his values mold her resilience and choices, leaving his life beyond parenthood unexplored to focus on the enduring echoes of his teachings.