A human of low character dies and gets sucked into Equestria as a copy of Twilight. The new mare then proceeds to cause chaos for the ponies, but she tries to help... and, more importantly, make some money
Discord summons his daughter, Eris, a brand new pet human in a bid to help reform her. Ripped right out of his home during a family Christmas party our not-so-heroic hero must adjust to a strange new world, without even his freedom.