Makochi is a Puchidol, a miniature version of the idol Makoto Kikuchi from 765 Production. Her discovery involves conflicting accounts: Miki Hoshii initially claimed to have found her during a gig, but clarification later revealed Piyopiyo actually brought her to the office, though Miki still received informal credit. Makoto Kikuchi quickly adopted her as caretaker.

This tiny idol possesses notable physical capabilities, including superhuman strength and proficiency in professional wrestling techniques. She demonstrated this during an attempted karate lesson with Makoto at a gymnasium, which unexpectedly evolved into wrestling training. There, she showcased her power by lifting the producer and executing her signature suplex, the "Makochi special." Beyond combat skills, she exhibits healing abilities and unexpected adaptability to physical training and dietary changes. Makoto's tendency to overfeed her sweets and snacks leads to significant weight fluctuations, but Makochi adapts rapidly to these physical shifts.

She participates in various activities within the 765 Production office, including joining a radio program hosted by Yukiho. Sociable and friendly toward fellow Puchidols and humans, Makochi also displays competence in playing video games. Her interactions feature bonding moments with Makoto and occasional playful engagements with others, such as welcoming breaks from excessive feeding routines.

While she lacks a detailed, evolving character arc across seasons or spin-offs, Makochi's established traits—her strength, adaptability, and dynamic with Makoto—remain consistent throughout her appearances in the anime, manga, and related media.