Whose relationship is the stranger describing when he says he strove to shelter her as a fair exotic is sheltered by the gardener?

The stranger is describing the relationship between himself and a woman he admires, likely highlighting his desire to protect and nurture her as one would care for a delicate and beautiful plant. The metaphor suggests a sense of reverence and devotion, indicating that he sees her as something precious and deserving of care, much like a gardener tends to an exotic flower in a garden. This dynamic may also imply a sense of distance or idealization, as he positions himself in a role of caretaker while she remains somewhat separate or elevated.