Musette

A Demon Lord with the wings of an Angel appearing in the collab "The Night Country and the Heroes of the Seven Worlds". She comes from Parade Buster with Lest, Lyla and Bell.

Biography
She first appears in chapter 3, as she's responsible to brainwash the Grand Noah Queen under order from the Queen of Dreams. Her plan was to get Tarsa to bring in the Château des Romances. She then have Lest violated by Tarsa to incapacitate the swordsman when the duo shows up in front of the queen in Grand Noah.

She reappears at the end of chapter 7 after the team brought Tarsa back to her senses. She says that the ritual is almost complete, and engage the party into a fight. After her defeat, she decides to force the summoning of the Château des Romances while using Grand Noah's palace as a vessel. She then leaves the party as they get surrounded by nightmares.

Strategy
Yet another boss whose real threat comes from its abilities to inflict status effects. Thankfully, with Tarsa returning you now have a healer, which is for the best as you won't have healed since your fight with the latter.

Use Tarsa to keep your two damage dealers buffed and alive. If you focused on status effect resist, you can use charge skills to make greater damages, but it can be dangerous if you didn't.