Identities of characters in image

Wiimeiser
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
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
Dream Come True! - Participated in the MLP 9th Anniversary Event
Wallet After Summer Sale -
A Tale For The Ages - Celebrated MLP's 35th Anniversary and FiM's 8th Anniversary
An Artist Who Rocks - 100+ images under their artist tag

(Foil Hat)
Not entirely sure where to put this, so I think I’ll dump it here. Feel free to move it if you think I’m in the wrong forum.
 
I think the mare on the right in >>1564390 is Altus Bastion and it definitely looks like her, but I don’t know who the character on the left is. The source is no help, the description doesn’t name anyone and the only tags I can see are the two MLP tags…
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