Kurumi Risu-chan, a spirited squirrel from the Walnut family, navigates life alongside her father Cedric, mother Yardley, and brother Ralph. Her determination often clashes with her father’s whimsical inventions, sparking familial friction. In one pivotal arc, frustration over these antics drives her to audition for a school play’s princess role, spurred by friends’ encouragement. Though initially eager, stage fright overwhelms her until a mishap during dress rehearsal fractures her leg. Rallying together, her father and friends devise a solution, underscoring her resilience and capacity to adapt.

Kurumi’s vibrant persona shines through her affinity for yellow, mirroring her lively nature. Family anchors her journey, with mother Yardley providing steadfast support and her younger brother glimpsed in later tales. Subsequent mini-episodes place her in community-driven plots, though her evolution within these stories remains hinted rather than fleshed out.

Her narrative weaves familial bonds with self-growth, championing perseverance and teamwork. Interactions blend lighthearted humor with challenges, cementing her relatability. While later arcs beyond the original OVA and mini-episodes stay unexplored, her core traits and focus on family persist steadfastly across all appearances.