Nameless is an enigmatic, floating entity resembling a chubby infant encased within a peanut-shaped shell. It sports rabbit ears, a rabbit tail, and consistently retains a pacifier while speaking. Its origins, species, motivations, and biological gender remain unexplained.

Functionally, Nameless activates and coordinates the Rabbit Force. It first appears during an alien attack to awaken Mina Tsukuda’s transformation abilities, enabling her to become Rabbit Warrior Tsukishiro Mina. It similarly facilitates power awakenings in other characters, such as Halmina Goldberg, confirming their latent capabilities as Rabbit Warriors.

Nameless oversees the distribution and management of the Rabbit Force’s weaponry. It supplies each warrior with specialized combat equipment linked to their thematic produce, such as delivering an antique bazooka to Satsuki Mina due to her preference for conventional arms over advanced technology. The weapons teleport from a lunar base and attach to the warriors’ "triple tails" during transformation.

Transformation into a Rabbit Warrior demands consuming a specific vegetable or fruit associated with the warrior’s alter ego, followed by uttering "Ju-Jitsu." Nameless enforces this rule and occasionally imposes tests of character, such as offering Mina an amnesia-inducing weapon against Yuu Takanashi—a test Mina passes by refusing.

The entity strategically manipulates events to maintain Rabbit Force operations. It exposes Sumire Nishiha’s plot to discredit Ootsuki Mina by revealing recorded evidence of her scheme, leading to Sumire’s downfall. Nameless also shares a narrative link with Spo Luna producer Onoue, as both are voiced by the same actor, though no explicit connection is elaborated.

Despite its interventions, Nameless remains detached from emotional or interpersonal storylines. It operates as an impersonal force focused on treaty enforcement against alien sports fanatics, with no personal backstory or character evolution depicted.