Guys I found something out about the Jevil fight, the "Pirouette" act has specific actions according to the turns, here is a list about when you use it and what happens,
Turn 1: “It was just foley!” — No effect.
Turn 2: “JEVIL felt at ease!” — Jevil’s defense drops.
Turn 3: “Awkward!” — Upcoming attack’s invincibility frames are halved (makes the carousel harder to dodge).
Turn 4: “Tranquil!” — The dance (carousel) defends the party.
Turn 5: “What! It's nothing but a useless bird!” — No effect.
Turn 6: “It felt comforting!” — Heals a random party member (heal weighted toward Kris).
Turn 7: “Everyone's HP got jumbled up!” — Shifts all HP to the left (may shift right in rare cases).
Turn 8: “Jevil's upcoming move got powered up!” — Next attack deals more damage.
Turn 9: “A perfect 10!” — Heals everyone (30 HP).