Nana, once a devoted canine companion to Gorō Mutsumi, inherited her name from his kind-hearted neighbor. She reveled in daily walks with him until his move to a pet-restricted apartment forced her reluctant relocation. Fleeing her new home in a determined bid to reunite with Gorō, she succumbed to exhaustion just steps from his doorstep.

Reborn as a guardian angel, she embodies spirited, tomboyish energy echoing her past life, with a hairstyle evoking perky dog ears and an aura bathed in soft blue. A persistent dread of abandonment lingers from her harrowing separation and fatal journey.

As seasons advance, her age shifts from 8 to 9, her subtle maturation marked by slight physical growth. She channels relentless vigor into steadfast guardianship, prioritizing Gorō’s safety above all. Her story intertwines resilience against lingering fears with unshakable loyalty, her protective mission unwavering—though documented accounts omit specifics on expanded media roles.