Nabeshin is the author avatar persona of director Shinichi Watanabe, inserted as a character into various anime productions. He sports a deliberately eccentric appearance defined by a large afro hairstyle, a red suit, and a yellow tie, adopted to ensure visual distinctiveness. In "Puni Puni Poemy," he acts as the adoptive father of protagonist Poemi Watanabe and is married to Kumi-kumi. Alien attackers kill both Nabeshin and Kumi-kumi early in the narrative, but Kumi-kumi's acupuncture abilities later resurrect them. The story concludes by revealing that Nabeshin and Kumi-kumi were disguised as the very alien antagonists responsible for their deaths.

Beyond this series, Nabeshin appears in numerous anime, frequently in cameos. His most substantial narrative role occurs in "Excel Saga," where he functions simultaneously as a director within the show's meta-narrative and as a vigilante character. Here, he possesses an ambiguous, complex history involving allies and adversaries like Space Butler XIII, Tetsuko, and Pedro and Sandora (who share his "Power of the Afro"). He also features significantly in "Nerima Daikon Brothers" as a rental store owner aiding the main characters. Additional brief appearances include roles in "Hayate the Combat Butler" (episode 32), "Eyeshield 21" (episode 16), "Yamato Nadeshiko Shichi Henge" (episode 24 and as narrator), "SKET Dance" (episode 8), "Tayutama: Kiss on my Deity," "Nyan Koi!," "Samurai Girl: Real Bout High School," and "Zettai Karen Children."

Nabeshin consistently breaks the fourth wall, openly acknowledging his status as a fictional insertion and director. He exhibits a flair for the dramatic, employing over-the-top actions and dialogue. His character is defined by unpredictability, frequently altering narrative trajectories and embracing absurd or surreal storytelling devices. Nabeshin maintains an air of mystery, with hints of a vast, unexplained backstory involving past conflicts and associations, though these elements are rarely detailed.