@Background Pony #BDB8  
According to this post of the modder:  
https://www.nexusmods.com/stardewvalley/mods/8397?tab=posts
 
We got :  
Twilight = Maru  
Fluttershy = Penny  
Emily = Pinkie  
Leah = Applejack  
Harley = Rarity (guessed this one right)  
Abigail = Rainbow Dash (no where left to fit)

There’s a mod that turns MLP characters into them: Horse Women
 
We’ll get our six main mares first.
 
Now:  
Twilight = Maru  
Fluttershy = Penny
 
Fitting!
 
Next, I guess:  
Abigail = Pinkie (random girl)  
Leah = Rainbow Dash (brash lesbian)  
Harley = Rarity (the fashionista chic)  
Emily = Applejack (the most basic girl)
 
stallions… I find it will be tough choice… given not enough important male characters,  
2 most notable males aren’t even equines  
The mod name is “Horse Women”, I guess it would rather scoped on the bachelorettes.

Really nice
 
Love the Leah pone…. but shes best girl in my opinion

Just missing the flake.

Penny is best girl/pony

Adorable, but we need pony Emily now!

What about the guys?

Haley is pretty!

The game is actually really nice.  
It’s like playing Harvest Moon and Rune Factory at the same time. xD

Glorious waifus! \0/