Kevin's estranged teenage son whose need for medication drives the plot and whose emotional reconciliation with his father provides the story's core.
Kevin is the estranged father of Shaun, whose absence and medication needs create central familial tension.
Linda is Shaun's mother and primary guardian, facilitating his eventual reunion with his father.
Sherry acts as the maternal figure who bridges the gap between Kevin and Shaun during the crisis.
Explore the full interactive character relationship map of The Lost Bus