Colin Craven, son of Archibald Craven and cousin to Mary Lennox, became confined to his bed by his emotionally distant and excessively protective father following his mother Lilias Craven's death during childbirth. This isolation fostered a fearful, lonely, and emotionally sensitive disposition in Colin, linking his self-image tightly to perceived physical limitations and dependence on others.

Initially headstrong and insufferable, Colin frequently clashed with Mary upon her discovery of him. His temperament was marked by moodiness and aloofness, fueled by a deep-seated fear of pain and rejection. He harbored significant anxiety about his father's potential death, fearing orphanhood and utter isolation. Colin's interactions within the secret garden, facilitated by Mary and Dickon Sowerby, became central to his development. Exposure to nature and gradual physical activity sparked a transformation, diminishing his fears and fostering emotional resilience.

His physical progression unfolded through incremental milestones, culminating in his ability to stand and walk independently, symbolizing recovery from both psychological and physical constraints. Reconciliation with his father within the garden broke the cycle of mutual neglect and estrangement. This reconciliation influenced Archibald Craven's decision to preserve the garden, securing its role in Colin's well-being. By the conclusion of his arc, Colin evolved into a more confident and proactive individual, actively participating in the garden's upkeep and demonstrating a newfound capacity for kindness and connection that contrasted sharply with his initial presentation.