Pinkamena Diane Pie
Question Pinkamena
Fractured Loyalty
Rainbow Factory Dash
Dead Rainbow Dash
Researcher Twilight
Murdershy
Flutterbitch
Butchershy
Lil Miss Rarity
Sadistic Rarity
Paranoid Twilight
Discord Derpy
Discord Whooves
Mister Clever
The Master
Human Maker Lyra
Vinyl the Vampire
The Sadistic Scootaloo
Straight Razor

3244211 Murdershy, hooves down in my opinion.

me I have to say Dead Rainbow Dash, she'd kill you for even escaping pinkamena alive. she hates her that much, she would even kill an escaped captive.