How to Complete Making Music
The objective is to defeat the Alchemist. The law forbids harming females, so you will have to avoid hitting the Gria Raptor (the girl with horns and wings). For that reason, you might want to disable your Counter abilities and other damaging Reaction abilities. You also need to be careful if any of your units get Charmed by the traps that the Ranger sets around the field. If this happens, try to throw a Knot of Rust at the Charmed unit to make it snap out of it. Knot of Rust acts like a thrown weapon and it only does a small amount of damage, making it ideal for removing status conditions like Charm and Berserk.