Originally encountered as a Killer Spider, Kaede defends Takumi Iruma from a wild boar attack. This act leads Takumi to adopt her, forging a telepathic bond that translates her thoughts into words he understands. Her essential role involves supplying silk for Takumi's alchemy-based crafting. Kaede later undergoes a significant metamorphosis, evolving into an Arachne—a form combining a humanoid torso with her spider body. This transformation unlocks her ability to speak independently, ending her reliance on Takumi to communicate. Her story includes adopting a Drake Horse, which evolves into the Dragon Horse Camellia. As a member of Takumi's group, the "Wings of Nolyn," Kaede applies her silk-production skills and evolved abilities to support their shared goals.