Pojirin is a mole character with brown hair and glasses who exhibits enthusiasm for digging activities, particularly at the start of planting season. He is consistently allied with the antagonist trio alongside Mujirou and Deegorou, actively supporting Mujirou's schemes to seize fertile farmland in Ibaraki prefecture. His role involves participating in attempts to sabotage or take over agricultural land from the protagonists. The character maintains a static presence without elaborated personal history or development arcs, and his actions remain confined to his recurring role as an adversarial figure within the series conflicts.