Caddie's older brother and adventure companion, known for taking the lead in their exploits and demonstrating strong family loyalty.

Caddie's younger brother who participates in her and Tom's adventures, often mirroring his siblings' ideas and actions.

Caddie's younger sister who often tells on her siblings and strives for inclusion in their activities, slowly developing a more positive relationship with them.

The patriarch of the Woodlawn family, who supports Caddie’s free-spirited upbringing and exemplifies values of hard work, compassion, and understanding.

Caddie's mother, initially daunted by the wilderness of Wisconsin, who embodies adaptability in her expectations for herself and her daughter.

A Native American man who forms a respectful relationship with the Woodlawn family, exemplifying kindness and fostering understanding between cultures.