Kotone Amano

Kotone is Nene's younger sister. In the manga, Nene is helping DarkKnightmon because he promises to help Nene free Kotone, who is in a coma and sealed within a crystal. She is considered a General, and DarkKnightmon plans to use the Xros Codes of Kotone, Nene, and either Kiriha or Taiki in a ritual.