It's been bothering me since the beginning. Did he move her farther from Nn? Did he heal mental damage that occurred after the Battle of the Bands? Did he make her smarter(if so by who's standards of intelligence and that would be incredibly evil) plus if it's the finale one from how Sonata talks about her past in the Sunny and Lemon fic she wasn't dumb before Mr.Discord.

7325385

https://www.fimfiction.net/story/269241/9/oversaturation/light

An attempt to hum had confirmed that she still didn't have her magic, even if her teeth felt closer to what they should be. At least she wasn't in pain anymore, her body back in human form.

Sonata shook her head. "I... My brain."

"Oh dear. How many fingers am I holding up?"

"No. It's working better. Like, a lot better." Sonata's jaw dropped as she looked up at the man. "Is this what it's like to be human?"

I'd take a guess and say, basically everything's the same except she's lost her Siren instincts to need to feed on negative energy and stuff...

OH! She's basically like any other Siren Aspect. I think. Excepting what the Heartstones do.

https://www.fimfiction.net/group/210047/the-oversaturated-world/thread/238461/worldbuilding-magic-in-the-new-world:

Siren Aspect

Allow me to preface this entry with an important caveat: The following observations are based solely on a single subject, my capable assistant Sonata Dusk. She and her colleagues appear to be the only representatives of this phenotype on the planet, though Sunset Shimmer has acknowledged that others may be out there.