Mother is the brown bear matriarch leading her woodland family in a remote wilderness. She raises her biological cubs, the albino Shiro and Dai-chan, alongside her adopted wild boar child, Uribo. Her parenting blends practical discipline with deep care, seen in daily survival lessons like teaching her offspring to fish. She sets clear expectations for their growth, observing Shiro's frequent distraction and Uribo's minimal speech compared to Dai-chan's quicker mastery of skills.

When Shiro and Uribo chase a turtle during fishing practice and are swept downstream, Mother instantly rallies Dai-chan to pursue them, putting family safety above the cubs' disobedience. This rescue triggers an unexpected journey far from their mountain home. Throughout this displacement, she remains the family's anchor, guiding them past strange human objects such as knives, televisions, and jeweled crowns. She leads their cautious exploration of an abandoned human city, navigating both humorous and eerie discoveries before steering them back towards their native habitat.

Mother speaks verbally to her children, distinct from Shiro's non-verbal sounds or Uribo's limited words. Her dialogue asserts authority while strengthening family bonds. The narrative focuses solely on her present role as caregiver and protector, without exploring her origins or internal development beyond these core interactions.