Xenon is from a mysterious planet, inhabited by birds, dragons, pegasus, and other winged creatures. Being bored with her life, Xenon joined the Bounty Hunters for fame, and to kill off people she hated on her planet. As her life went on, the poor woman was horrorifed to discover she had some sort of cancer, non-curable and very fatal. Then, she came across a planet....named Earth. Seeing a cure, Xenon kidnapped X, copied his designs and remade herself to live longer. Her new cyber implants prevent the cancer from spreading, or perfecting her performance.