Cosmas-the-Explorer
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Non-Fungible Trixie -
Notoriously Divine Tagger - Consistently uploads images above and beyond the minimum tag requirements. And/or additionally, bringing over the original description from the source if the image has one. Does NOT apply to the uploader adding several to a dozen tags after originally uploading with minimum to bare tagging.

Explorer in Training
We’ve seen so much Maud.
I want Limey and Marble!
They deserved to have their own episodes.
I love Maud but lets face it she had her time in the sun. But the other two, the sun didn’t even hit them.
@Background Pony #7694
Maybe Marble and Limestone would have more character dimensions if their had been some episodes with them.
Background Pony #808D
OK ok ok geez you are very angry pony 😨
OneOverTwo
A Really Hyper Artist - 500+ images under their artist tag
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
A Really Classy Artist - 250+ images under their artist tag
An Artist Who Rocks - 100+ images under their artist tag
Artist -

Spinister
@Scrounge  
I was really bummed about Limestone not talking.
Scrounge
My Little Pony - 1992 Edition
Wallet After Summer Sale -
Not a Llama - Happy April Fools Day!
Since the Beginning  -

nobody's favorite
And then they were in the episode. Not in a big role or anything, but they showed up.
Crimson Prose
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice

Gore Fics For Fun
They even mentioned that she has swap dates with all of them, which also implies that they have the same with one another. Marble and Limestone was probably off somewhere while Maud was with Pinkie in the one episode.
 
It’d be really nice to see some of that. we still don’t really have a proper personality for either of them. Characters in this show are usually more complex than just stamping ‘shy’ and ‘angry’ on them
Meh brony
Condensed Milk - State-Approved Compensation

One magic spider boi
@Red-Supernova  
Probably due to how shy people are perceived as weak and defenseless thus triggering a protective response from the fans whenever they see a shy character.  
@Background Pony #FED6  
My guess is that it’s just someone who’s either a troll or doesn’t like that someone is pointing out that muad’s getting another focus episode while pinkie’s other sisters get ignored.  
Personally I’ll be angry if they go another entire season without a celestia episode.
Red-Supernova
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Betrayal! - Betrayed their team for a badge. Shame forever!
Non-Fungible Trixie -
Ten years of changes - Celebrated the 10th anniversary of MLP:FiM!
My Little Pony - 1992 Edition
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
Wallet After Summer Sale -
Thread Starter - The Mega Man thread!
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.

Passionate opinionator
@Meh brony  
Why is that?
Background Pony #80F0
Why does this have the “op is a duck” tag?
Meh brony
Condensed Milk - State-Approved Compensation

One magic spider boi
@Red-Supernova  
Honestly there seems to be quite the obsession with shy characters in this fandom.
Corrderio
Not a Llama - Happy April Fools Day!
The End wasn't The End - Found a new home after the great exodus of 2012

I'm outie 5000
@Red-Supernova  
This fandom obsesses over every stupid little thing. That really isn’t a surprise.
OneOverTwo
A Really Hyper Artist - 500+ images under their artist tag
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
A Really Classy Artist - 250+ images under their artist tag
An Artist Who Rocks - 100+ images under their artist tag
Artist -

Spinister
@Miss Shy  
I’ve gotten into actual physical fights with my older brother so yes.
 
(Point being they could give Limestone & Pinkie a less friendly than average for the show sibling relationship to explore.)
Miss Shy
Cutest Little Devil - Celebrated the 14th anniversary of MLP:FIM!
Rainbow Rocks 10th Anniversary: Aria Blaze - Celebrated the 10th anniversary of EQG Rainbow Rocks!
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Roseluck - Had their OC in the 2023 Derpibooru Collab.
Elements of Harmony - Had an OC in the 2022 Community Collab
Non-Fungible Trixie -
Preenhub - We all know what you were up to this evening~
Twinkling Balloon - Took part in the 2021 community collab.
Ten years of changes - Celebrated the 10th anniversary of MLP:FiM!

You're going to love me.
@OneOverTwo  
Have you seen how siblings normally get along?
OneOverTwo
A Really Hyper Artist - 500+ images under their artist tag
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
A Really Classy Artist - 250+ images under their artist tag
An Artist Who Rocks - 100+ images under their artist tag
Artist -

Spinister
@aza191  
I can’t. It makes more sense to not want to bring Marble back of the two since dealing with shyness is a subject the show’s done many times, but Limestone’s somewhat abrasive personality feels like it could take an episode to a good area to explore that it hasn’t yet. Especially since Hearthbreakers seemed to hint that Pinkie didn’t get along that well with Limestone.
Red-Supernova
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Betrayal! - Betrayed their team for a badge. Shame forever!
Non-Fungible Trixie -
Ten years of changes - Celebrated the 10th anniversary of MLP:FiM!
My Little Pony - 1992 Edition
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
Wallet After Summer Sale -
Thread Starter - The Mega Man thread!
Not a Llama - Happy April Fools Day!
Friendship, Art, and Magic (2017) - Celebrated Derpibooru's five year anniversary with friends.

Passionate opinionator
@Meh brony  
And yet many bronies feel in love with her. :P
aza191

Well, I can understand why the writers didn’t want to bring Limestone back…
OneOverTwo
A Really Hyper Artist - 500+ images under their artist tag
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
A Really Classy Artist - 250+ images under their artist tag
An Artist Who Rocks - 100+ images under their artist tag
Artist -

Spinister
@Miss Shy  
Which also means lack of availability isn’t an excuse if Maud’s there, which certainly can’t help people’s annoyance.
Background Pony #7694
@Miss Shy  
Ingrid killed it tho
Miss Shy
Cutest Little Devil - Celebrated the 14th anniversary of MLP:FIM!
Rainbow Rocks 10th Anniversary: Aria Blaze - Celebrated the 10th anniversary of EQG Rainbow Rocks!
Silly Pony - Celebrated the 13th anniversary of MLP:FIM, and 40 years of MLP!
Solar Supporter - Fought against the New Lunar Republic rebellion on the side of the Solar Deity (April Fools 2023).
Roseluck - Had their OC in the 2023 Derpibooru Collab.
Elements of Harmony - Had an OC in the 2022 Community Collab
Non-Fungible Trixie -
Preenhub - We all know what you were up to this evening~
Twinkling Balloon - Took part in the 2021 community collab.
Ten years of changes - Celebrated the 10th anniversary of MLP:FiM!

You're going to love me.
It’s funny because they’re all voiced by the same VA.
Aer0 Zer0
Chaotic Little Trees - 1000+ images under their artist tag
Shimmering Smile - Celebrated the 10th anniversary of Equestria Girls!
Non-Fungible Trixie -
Kinship Through Differences - Celebrated the 11th anniversary of MLP:FIM!
Twinkling Balloon - Took part in the 2021 community collab.
My Little Pony - 1992 Edition
Friendship, Art, and Magic (2020) - Took part in the 2020 Community Collab
Charitable Contributor - Contributed to a series of art packs that helped raise over $10,000 for charity
Dream Come True! - Participated in the MLP 9th Anniversary Event
A Really Hyper Artist - 500+ images under their artist tag

Obsessed with 🍩
Pagan

Gay Viking
Pagan

Gay Viking
@ChuymaruZ  
aaayyy.
OneOverTwo
A Really Hyper Artist - 500+ images under their artist tag
Magical Inkwell - Wrote MLP fanfiction consisting of at least around 1.5k words, and has a verified link to the platform of their choice
Not a Llama - Happy April Fools Day!
A Really Classy Artist - 250+ images under their artist tag
An Artist Who Rocks - 100+ images under their artist tag
Artist -

Spinister
@Corrderio  
One dimension each, but they’re different dimensions.  
& they were here first, I guess.
Meh brony
Condensed Milk - State-Approved Compensation

One magic spider boi
@Corrderio  
Agreed especially marble who’s essentially the earth pony version of fluttershy and unlike coco and vapor she really doesn’t have much personality other than being shy.