Once We Part Ways

Once We Part Ways is Disc 2, Track 17 on the Xenoblade Original Soundtrack. It plays during these cutscenes:
 * Shulk and Reyn departing from Colony 9 to take revenge on the Mechon
 * The party escaping from Agniratha after the battle against at the Meyneth Shrine
 * Shulk's decision for a world with no gods after Alvis asks him what to do with this world
 * Melia finishing Yumea and Tyrea's departure at the Lakeside in Makna Forest during the Melancholy Tyrea

It also plays in Xenoblade Chronicles: Future Connected, when Melia convinces Maxis and the Companions to rejoin those at Gran Dell.