TV-Series
Description
Najimi Tenkuji is the childhood friend and classmate of the protagonist Kakeru Daichi, and she shares the same first-year classroom at Kyugetsu High School. She is the heiress of the Tenkuuji group of companies, which operates an airline called Sky Air, yet she is notably frugal and dislikes waste—she reuses tea leaves and uses soap down to the last sliver, a trait that sometimes draws comments about a waste-not spirit. Her most recognizable physical trait is the lock of hair on top of her head that acts like an antenna, changing shape to reflect her mood; for instance, it may droop or stiffen depending on how she feels.

Najimi has a gentle and easygoing demeanor, always kind to those around her. However, she possesses a vivid and sometimes bizarre imagination that can pull her into her own fantasy world, especially when it comes to matters involving Kakeru. This tendency occasionally reveals a surprisingly sly or delusional side, though she remains fundamentally good-natured. When struck by jealousy, she exhibits a peculiar behavior: she transforms into a likeness of a Kuribo from the Super Mario series and begins kicking Kakeru's calf in frustration.

Her primary motivation is her deep romantic affection for Kakeru, which she has held for a long time. This feeling drives much of her involvement in the story. She also becomes entangled in the conflict between steel-can and aluminum-can Akikans after she accidentally drinks from a sports drink that transforms into a girl named El. Initially uneasy about accepting the Akikan, she eventually welcomes El as a friend and a maid, forming a close bond with her.

In the overall narrative, Najimi functions as the childhood-friend love interest and a source of emotional grounding for Kakeru. She provides both comedic moments—through her jealous outbursts and flights of fancy—and sincere support as the series progresses. Her character shows some growth as she learns to embrace the strange circumstances of the Akikan world and deepens her relationships, particularly with El and Kakeru.

Najimi does not possess any supernatural combat abilities; her strength lies in her practical, thrifty nature and her emotional steadfastness. Her unique hair antenna and mood-driven physical reactions are the most notable quirks that define her visual and behavioral character.