Pochette no Yoroi-san is a member of the Yoroi-san species, humanoids who wear armor. This character sports grey armor and notably carries a self-made pink bear-shaped crossbody bag, frequently appearing in promotional materials. Their occupation is crafting and selling handmade merchandise, specializing in cute items like pouches and pajamas. They work as a street vendor, often handing out free samples of new products to Chiikawa and friends for testing before public release.

Among all Yoroi-san, they maintain the closest relationship with Chiikawa, Hachiware, and Usagi, though this familiarity draws a gentle reprimand from the head Yoroi as it is discouraged. Communication with non-verbal characters occurs primarily through Hachiware, the only creature fluent in human language. Key interactions include rescuing Chiikawa from a botched self-haircut, resulting in an altered fur proportion. In gratitude, Chiikawa and friends gifted a bear claw accessory, which unintentionally drew suspicion from other Yoroi-san.

Pochette no Yoroi-san shares friendships with fellow Yoroi-san like Rōdō no Yoroi-san and Ramen no Yoroi-san, often socializing during activities such as picnics. Beyond the narrative, the character appears in licensed merchandise, including a "Waiting Pochette Yoroi-san" mini towel with antibacterial treatment and an extensive product line encompassing apparel, accessories, and stationery.