Korora
Let's keep calm here...
Now, on another topic, is there a clear timeline for these? Because the fourth Twilight Sparkle interview has to take place some time after _*Slice of Life_*; the Doctor needs time to realize that he can tell Derpy the truth. Meanwhile, the fourth Dash interview dovetails well with _*28 Pranks Later_*; why else would Dashie be so cruel to Derpy?)