Gonjiro is an enigmatic entity woven entirely from crimson hair, manifesting as a towering scarlet sphere of tangled locks. His existence converges with a shy elementary schooler after bonding with the child’s button, forging an empathic bond that instinctively mirrors the student’s emotional states. This connection drives him to intervene in daily struggles through unconventional powers: fluidly morphing between forms, seamlessly blending with surroundings through his "Fit" technique, or activating "Button Change" metamorphosis to reconfigure his fibrous composition.

While fiercely devoted to safeguarding his companion, his chaotic interventions frequently escalate situations unpredictably. A whimsical troublemaker compulsively driven to diffuse tension, he balances mischief with earnest attempts to liberate others from inhibitions, championing unfiltered self-expression. The entity shares the student’s culinary passion for yakisoba sandwiches, often incorporating the snack into his antics.

Operating within self-contained episodic adventures, Gonjiro employs his mutable hair form to manipulate environments and objects, navigating crises with childlike curiosity and accidental collateral damage. His origins and purpose remain obscured, his motives flickering between guardian spirit and playful anomaly as he maintains his cryptic nature.