U-DO ~ Febronia is a song from Xenosaga Episode II. It is track on the Xenosaga Episode II Original Soundtrack, having been composed by Yuki Kajiura. The full song plays during the scene where Shion Uzuki and her allies see Cecily and Cathe's injured bodies plugged into the Zohar via the U.M.N., and Febronia's spirit appears before Shion and asks her to set her sisters free by killing them. The first and last parts of the song play during the scene where Jr. confronts Albedo Piazzolla, who has merged with U-DO.