Nanachi’s life took a fateful turn when they were lured into the clutches of Bondrewd, a White Whistle Delver notorious for conducting inhumane experiments on children to study the effects of the Curse of the Abyss. Alongside their closest companion, Mitty, Nanachi became a subject of Bondrewd’s research in the Idofront, the facility he controlled in the 5th Layer. The experiment subjected Nanachi and Mitty to simultaneous ascension from the 6th Layer, exposing them to the Curse’s devastating effects. While Nanachi was transformed into a Narehate with a somewhat humanoid mind and body, Mitty’s form was grotesquely warped into an immortal, helpless creature. Devastated by Mitty’s fate and unable to bear their suffering, Nanachi fled the Idofront with Mitty, finding solace in isolation within the 4th Layer.

Nanachi’s life of solitude ended when Riko and Reg stumbled upon their hideout. Their initial hesitance to trust the pair gradually gave way to a deep bond, driven by Riko’s determination and Reg’s kindness. Together, they embark on a journey to confront the Abyss’ many dangers, while Nanachi seeks redemption for their past and closure for Mitty’s suffering.

Nanachi’s appearance is a testament to the transformative effects of the Abyss’ Curse. They have a fur-covered body resembling a small mammal, with long ears, a bushy tail, and clawed hands and feet. Their eyes, large and expressive, retain a hint of humanity despite their altered form.

Nanachi’s attire reflects their resourcefulness and practicality. They wear a hooded cap adorned with ear-like extensions and a simple cape, which provide protection from the Abyss’ harsh environment. Their design seamlessly blends animalistic and humanoid traits, symbolizing their unique existence as a Narehate.

Nanachi is a complex character, shaped by the trauma of their past and their compassion for others. They are intelligent, resourceful, and cautious, often serving as a voice of reason in the group. Their knowledge of the Abyss’ ecosystem and survival techniques makes them an invaluable guide, while their medical expertise saves lives on multiple occasions.

Despite their reserved demeanor, Nanachi has a dry sense of humor and a playful side, often teasing Reg in moments of levity. Beneath this facade, however, lies a deep-seated guilt over Mitty’s fate and an unwavering resolve to protect Riko and Reg. Their journey with the duo helps Nanachi rediscover a sense of purpose and belonging.

Meeting Riko and Reg
Nanachi is introduced when Riko and Reg reach the 4th Layer of the Abyss. After Riko is poisoned by an Abyss creature, Nanachi saves her life, showcasing their medical expertise and resourcefulness. Initially hesitant to trust the pair, Nanachi gradually warms to them and decides to join their journey.

Confronting Bondrewd
Nanachi’s backstory comes to the forefront during the group’s encounter with Bondrewd in the 5th Layer. This arc reveals the harrowing details of Nanachi’s transformation and their relationship with Mitty. The confrontation with Bondrewd allows Nanachi to face their trauma and achieve closure, particularly when Reg grants their request to end Mitty’s suffering.

Journey to the Abyss’ Depths
After the events in the Idofront, Nanachi becomes a permanent member of Riko and Reg’s group. Their vast knowledge and experience prove crucial in navigating the increasingly dangerous layers of the Abyss, while their emotional growth enriches the story’s themes of resilience, friendship, and self-discovery.

• Riko
  Riko’s optimism and determination inspire Nanachi, who becomes a mentor and protector for the young Delver. Their bond deepens as they journey together, with Nanachi serving as a source of guidance and comfort.

• Reg
  Reg and Nanachi share a deep friendship built on mutual trust and understanding. Reg’s loyalty and compassion help Nanachi confront their guilt and open up to others.

• Mitty
  Mitty was Nanachi’s closest companion and a constant source of joy and love during their time with Bondrewd. Mitty’s tragic fate haunts Nanachi, driving their actions and shaping their outlook on life.

• Bondrewd
  As the architect of Nanachi’s suffering, Bondrewd represents the cruelty and inhumanity of the Abyss. Nanachi’s encounter with him is both a confrontation with their past and an opportunity for closure.