Anpanman sprang to life when a "star of life" meteorite struck Uncle Jam's oven during an anpan baking session. This imbued the pastry with existence, forging Anpanman as a superhero dedicated to justice. His head, crafted from bread filled with tsubu-an (chunky red bean paste), acts as his primary power source and sole sustenance, eliminating his need for conventional food or drink; the bean paste provides his energy, though he is never seen consuming anything himself.

He wears a distinctive red-orange uniform with a brown cape, yellow gloves, boots, and belt, featuring a smiley face emblem on his chest. His appearance is marked by a prominent red nose, rosy cheeks, and a constant smile. His cape grants him flight, but this power vanishes if the cape tears, requiring repair by Batako to restore it.

His abilities encompass superhuman strength, demonstrated through signature attacks like the An-punch and An-kick, powerful enough to shatter metal or launch foes vast distances. He also possesses super hearing, detecting distress calls globally. Crucially, his resilience comes from regeneration: replacing his damaged head restores full strength. Uncle Jam bakes a new head, causing the old one to detach with crossed-out eyes.

Key vulnerabilities center on his head: exposure to water, dirt, mold, or physical damage weakens him, potentially grounding him. A transparent helmet protects him in wet conditions. His altruism also compromises his strength, as he willingly breaks off pieces of his head to feed the starving, necessitating frequent head replacements.

Relationships define him. Uncle Jam, his creator, serves as a paternal figure and scientific advisor. Batako aids in his care and cape maintenance. Cheese, a dog rescued as a puppy, is his loyal companion. Core hero allies include the hot-headed yet kind Currypanman and the level-headed yet narcissistic Shokupanman; together, they form a trio executing combined attacks like Double or Triple Punches. He shares sibling-like bonds with Melonpanna and Rollpanna, the latter grappling with dual hearts of good and evil, and mentors the youngest hero, Creampanda.

His archnemesis, Baikinman, emerged simultaneously with him. Despite their adversarial dynamic, Anpanman harbors no hatred and has sought reconciliation. Their conflicts stem from Baikinman's mischief or malice, though they occasionally unite against greater threats.

Creator Takashi Yanase's WWII experiences, including starvation as a soldier and prisoner of war, profoundly forged Anpanman’s core ethos: alleviating hunger and suffering through self-sacrifice, reflecting Yanase’s belief in nurturing generosity over conflict.

In the film *Soreike! Anpanman: Roll to Lola Ukigumo Shiro no Himitsu*, Anpanman confronts threats to protect others, consistent with his established role. The narrative features characters like Rollpanna and Melonpanna, aligning with his consistent portrayal across the franchise.