Guzuko was the LRIG of Sou Sumida in Lostorage incited WIXOSS. She now serves as one of the main antagonists in Lostorage conflated WIXOSS. She has a timid personality and the habit of often saying apologetic words such as Im sorry or Excuse me due to Sumidas constant verbal abuse. However despite her timid personality she will occasionally try to scold Sou when hes doing something that she thinks is wrong.