Onbu Obake manifests as a spectral entity within animated media. This spirit travels unseen, latching onto human backs to hitchhike unnoticed. Its form features elongated, spindly limbs perfectly adapted for clinging tightly to carriers. Exhibiting a playful trickster nature, it delights in pranks and creating minor chaotic disruptions for amusement. Despite its mischief, the entity harbors no malice and avoids causing genuine harm.

The spirit's origins remain undefined across official sources, lacking any established backstory concerning its creation, purpose, or motivations. While interpretations sometimes suggest wanderlust or an unspecified quest drive it, these remain unconfirmed speculations. Its persistent behavior involves traversing various locales while riding unsuspecting humans, maintaining a consistent pattern of lighthearted antics without significant character development.

Onbu Obake appears in multiple productions, including a 1955 animated film and a 1972 television series spanning 52 episodes. Throughout these appearances, its core portrayal remains unchanged: a ghostly figure inciting humorous or chaotic scenarios through its signature piggybacking. No substantive alterations to its personality, abilities, or narrative function occur in spin-offs, films, or episodic content. Its undefined history and static nature render it an enigmatic presence within its stories.