The Grateful Symphonia is for every Prism Team to perform the greatest Prism Act of all, the Grateful Symphonia with the center that became the Symphonia Queen, who earned the Eternal Symphonia Tiara.
Mia and Hye In earned the Eternal Symphonia Tiara together, which they earned the title of the Symphonia Queen. They perform the Grateful Symphonia alongside MARs、Serenon、Prizmmy☆ and PURETTY.
The Eternal Symphonia Tiara split into two.
Mia led her Prizmmy teammates in the Grateful Symphonia,
while Hye In joined with her PURETTY teammates,
MARs join in the Grateful Symphonia as well,