Weather Control Pegasi

Sunshower, Open Skies, Clear Skies, and Fluffy Clouds are four Pegasus ponies who first appear in the season five episode Tanks for the Memories; Fluffy Clouds appears later in Princess Spike.

Development and design
Sunshower is named similarly to Pegasus mare Sunshower Raindrops, G3 Earth pony mare Sunshower, and G1 seapony filly Sun Shower.

Open Skies has a similar color scheme to S04E24 Unnamed Earth Stallion #4.

An image of Fluffy Clouds was previewed in an animation image shown at Ponycon NYC on February 16, 2015.

Depiction in the series
Sunshower, Open Skies, Clear Skies, and Fluffy Clouds first appear in the season five episode Tanks for the Memories moving clouds from Cloudsdale to Ponyville for winter. When Sunshower asks Open Skies where the clouds are supposed to go, she ends up engaging in a confusing conversation with him and Clear Skies because of their names. Rainbow Dash uses the distraction to clear the clouds from the sky. When Open Skies asks where their "fluffy clouds" went, Clear Skies points in Fluffy Clouds' direction.

Fluffy Clouds appears again in Princess Spike as one of the delegates attending the Grand Equestria Pony Summit. At one point, he cries to Spike because a pony had taken his seat in the "Don't Spend All Your Bits" speech presentation hall and seeks advice. Fluffy Clouds brushes off Spike's advice at first, but he listens when he believes the advice came from Twilight Sparkle.

Other depictions
Sunshower, Open Skies, and Clear Skies are all playable characters in Gameloft's mobile game, added in the version 2.6 update on December 14, 2015. Clear Skies' in-game description states, "Up there, in the clouds! Is it a bird?! Is it a Breezie?! Nope -- it's Clear Skies!"

Merchandise
Sunshower, Open Skies, Clear Skies, Fluffy Clouds all appear on the Season 5 poster.

In the Equestrian Odysseys of Enterplay's collectible card game, card #30 R of Open Skies and Clear Skies gives them the description "Open Skies and Clear Skies don't really get along with Fluffy Clouds. It seems like they just don't mix well together for some reason." and card #92 C of Sunshower attributes to her and Rainstorm the respective quotes "Tomorrow we'll start with overcast and move to rainstorm." and "Wait, are we talking about the forecast or my work schedule?" In the High Magic expansion set, card #26 R of Fluffy Clouds attributes to Manehattan Delegate and Whinnyapolis Delegate the respective quotes "What city is he even representing?" and "Gosh, I don't think even HE knows that."

Quotes

 * Sunshower: So where do these clouds go?
 * Open Skies: Over by Clear Skies.
 * Sunshower: But there's clear skies everywhere.
 * Clear Skies: Yo, Clear Skies right here!
 * Sunshower: But there's clear skies over there, too!
 * Clear Skies: That's Open Skies!
 * Sunshower: There's open skies everywhere!
 * Open Skies: I'm not everywhere. I'm right here!
 * Sunshower: [sighs] Wait. So you're Open Skies, and you're Clear Skies. Then what's all that?
 * Clear Skies and Open Skies: Open, clear skies!
 * Open Skies: Hey, where'd our fluffy clouds go?
 * Clear Skies: Fluffy Clouds? He's over there!
 * — Tanks for the Memories

"Here comes the next shipment! Move those clouds over!"

- Sunshower, Tanks for the Memories

"I was really looking forward to the "Don't Spend All Your Bits" Speech, but when I went into the hall, [tearing up] a pony had taken my seat. A pony who used to be my friend!"

- Fluffy Clouds, Princess Spike

"No offense, but I don't need some random dragon's opinion. I-I want to hear what Princess Twilight thinks."

- Fluffy Clouds, Princess Spike

"[gasps] Of course! Oh, the princess is so wise!"

- Fluffy Clouds, Princess Spike

"Tomorrow we'll start with overcast and move to rainstorm."

- Sunshower, Enterplay collectible card game Equestrian Odysseys card #92 C of Sunshower