Nanachi

Nanachi is a Hollow who lives in the sixth-layer-influenced regions of Made in Abyss and becomes a companion to Riko and Reg. Once a human child, Nanachi was subjected to Bondrewd's experiments and survived the Curse of the Abyss while Mitty suffered a far more tragic transformation.

Nanachi's role and development in Made in Abyss

Nanachi is cautious, sarcastic, practical, and deeply compassionate beneath a defensive manner shaped by guilt and trauma. They possess excellent medical knowledge, survival skills, tracking ability, and an unusual capacity to perceive the force field of the Abyss.

Nanachi's powers, allies, and character growth

Nanachi's devotion to Mitty and later bond with Riko and Reg drive their decision to leave isolation and continue descending into the Abyss.