Just as Noboru is associated with cats, Toru is associated with birds. Thus, symbolically, this could position Toru as Noboru’s prey, though that relationship has yet to play out in the novel. However, the wind-up bird has other symbolic associations in the book, including free will. As “Mr. Wind-Up Bird,” Toru could be the one who winds the spring of the world, as Kumiko put it at the beginning of the novel. Alternatively, Toru could be the wind-up toy itself, which springs into action only after an outside source winds it and thus is not in control of its actions.