Jackie, the sole female among twelve bears, shares a mountain boarding house with her eleven brothers. Mischievous and curious by nature, she thrives in their supportive company. Her adventurous spirit leads her to encounter Katie, a frail bear, in a meadow, sparking an instant bond. When Katie falls ill, Jackie rallies her brothers for a pivotal quest to aid her friend's recovery.

In subsequent events, Jackie's impulsiveness emerges as she consumes her brothers' sweets, triggering conflict. Following reprimands, she departs home and meets Mindy, an apprentice pastry chef. This encounter draws Jackie to train at SWEETS LAND under Mindy's grandmother. There, she hones culinary skills while confronting external threats to the bakery, demonstrating adaptability and direct problem-solving.

Physically depicted as a small brown bear adorned with a striped bow—consistent across adaptations and merchandise—Jackie consistently drives narratives through her curiosity and impulsiveness. Her proactive dedication surfaces in efforts to assist friends like Katie and Mindy.