Crystal Skies was to be married; now he has blood on his feathers. Forced to move to Baltimare, he learns who he is, what's love, and where friendship ends. He gets involved with gangsters, intimately, but then his fiancée has a "Family" background.
Starlight is asked to teach Blueblood a lesson. The choices her heart makes will save or doom Canterlot. Ch50: On the mend, Starlight recognizes the skipper of the Eagle's Stoop. She's injured, and Starlight realizes it's all her fault.
Her best and only magic teacher, Sunburst, abandoned her. Proper Step refused to teach her magic; it wasn't "lady-like." She runs away and learns to fight with hoof and magic, to save her life—but doesn't realize she's becoming somepony's sharp tool.
Starlight has always distrusted friendship, but, when she is infected by a disease transmitted via magic, she has no choice but to listen to some lessons about friendship from Double Diamond. A Founding of Our Town / Love in a time of Covid-19 story.
Starlight Glimmer destroys Equestria when she learns how she actually lost her soulmate, Sunburst. Fixing her mistake, she learns time travel can lead to a revelation of the heart and the renovation of harmony. (An alt-ending to The Cutie Re-mark.)
After the crystalling, the banquets, and the private after-party, Starlight gets her chance to be alone with Sunburst. They realize that they share two things in common: their friendship and different perspectives of the day he got his cutie mark.
What did Starlight Glimmer really think when Twilight Sparkle wanted to teach a friendship lesson by setting a table? She might be forgiven. She may be considered redeemed. But... Is she changed inside? Appearances are deceiving.
When Celestia finds the Queen of Cliffside--a pony with a red-streaked yellow mane, somepony very much like her when she was a filly--she learns harsh lessons about the errors of her ways as she works to save Equestria from a curse: herself!