The Dazzlings

The Dazzlings is a group of 3 girls named Adagio Dazzle (leader), Aria Blaze, and Sonata Dusk, they were residing during Rainbow Rocks and they are the arch rivals of the New Directions, Rainbooms, and Shadowbolts and allies of Vocal Adrenaline.

Biography
S1

Revival
They were first seen attacking Finn by choking him out and then running off after getting attacked by Kurt. They were also shown making a deal with Jesse and Vocal Adrenaline by taking out Finn as their plain during Regionals, this also forms an alliance with them

Rainbow Directions
Jesse and Adagio were shown talking about how they will work our plan, Adagio also told Jesse to see if they could enter Regionals but Jesse said no due to the rules and Vocal Adrenaline were full at that time but he did name them assistants and backup dancers of Vocal Adrenaline.

Known Members
Adagio Dazzle: Joined as a member prior to Revival.

Aria Blaze: Joined as a member prior to Revival.

Sonata Dusk: Joined as a member prior to Revival.

Tupperverse Info
Despite them being manly in Glee: The Tupperverse Series, They were first shown attacking Heros and Villains (flashback) and joining Arthur Watts forming The Watts Alliance, Adagio is expected to compete in The Lawbreaker Arena but the series is on hiatus as of right now.

Trivia

 * There was supposed to be a mashup called, "Under Our Spell / Disturbia" but the song got cut due to time constraints and was changed only to, "Disturbia." The Song is not included in the special features but it was confirmed this was a song, it is unknown when this song will be released.
 * According to Twilight Sparkle (First Edition), the Dazzlings are at least over 1,000 years old.
 * The Dazzlings are the only glee club other than New Directions to have an album exclusively dedicated to them.