The information here comes from a post made by the official account on Hoyolab on 31 January 2024.

“Because Aeon will never give you up, never let you down, or abandon you. The Aeon will never make you cry, say goodbye, or tell a lie and hurt you.”

We're about to arrive at Penacony, the Planet of Festivities!
The grand Charmony Festival gathers numerous factions from across the cosmos. People who worship different Aeons converge here, each faction with its own unique characteristics. To prevent the Trailblazer from being caught off guard, Pom-Pom will give you a briefing about the Masked Fools today.

— Pom-Pom

From what Pom-Pom knows, among all the followers of the Elation, the Masked Fools' philosophy is particularly radical. They firmly believe that the ultimate truth of the world is nothing but a joke, and the profound meaning of everything lies in simple laughter.

In their pursuit of pleasure, they do whatever it takes to find it, often causing havoc wherever they go. Their goal is to stir the stagnant pools of life to surge about change. It is only then that the Fools derive their greatest pleasure. It would be a welcome sight if someone could turn the tables on them.

“The Erudition is a hunk of junk, the Preservation is a fool, The Hunt has no sense of humor, and the Destruction is a lunatic. All the Aeons are as stubborn as they come. What a shame for Aha!”
— A Masked Fool who is a self-proclaimed astronomy expert

The elated one understands that only the wise and sentient possess the privilege of understanding joy. Neither the dusty rocks nor the distant stars can fathom the humor that life entails.
A quest for formidable adversaries in games of strategy and activities to while away the time bears no winners or losers.
Instead, a search for the kind of laughter that leaves one breathless, will lead to the unexpected delights that uplift the soul toward divinity.

The one representing the Masked Fools at the festival is the unpredictable Miss Sparkle! Before the banquet stars, allow your considerate neighborhood Pom-Pom to give you the low-down~

Miss Sparkle is an eccentric character who heeds no warning and takes no advice in her pursuit of the Path of Elation. It's said that impulse is often the impetus of her actions, and she's as unknowable as they come.

Sparkle: Rules, societal dos and don'ts, all these made-up human moral codes — I've given it my all, but I just can't seem to shirk them!

Thus ends the Pom-Pom special edition “Introduction to the Masked Fools”~
What's that? You wanted more insider details about the VIPs and Factions at play?
Pom-Pom knows just what t do!
The Charmony Festival is about to being.
Please head to Penacony as per the invitation, Trailblazers~