Complex sentence: In the cadenza flim, she returns with a different outfit in saving the I-401 and helping her restore her systems from the Student council fleet and engages in a fight with her sister Hiei to let I-401 to deal with Musashi.
Split into simpler sentences: In the Cadenza film, she returns wearing a different outfit and helps to save I-401 and restore her systems from the Student Council Fleet. She then engages in a fight with her sister Hiei, allowing I-401 to deal with Musashi.