Well, her face looks completely non expressive. Her eyes seem to have a blank look. Like she's doing one mindless objective,and her mouth isn't showing any characteristic. Also, her mane and tail look like a complete mess. Usually, ponies are a bit picky about their hair. Soooo, it looks like a mind control. any more questions?
If you play Skyrim you'll know but to make a long wstory short the whole race of dwemer disapeared (exept 1 who wasn't there at the time) and no one knows why in the games atleast but we the fans have a good idea, it's a long story but interesting.