Soon after Twilight got her Cutie Mark and was accepted to be Celestia`s personal student, Twilight velvet and Night Light soon had a young male filly who was an Alicorn, who was then named Midnight. Shocked by this, Celestia decided that once old enough, Midnight will join Twilight in her studies. Midnight is a reincarnated Human, but has no memories of his human life, but for what reason? All that is known is that a threat from the North is responsible for this.
(This will follow the TV series until a certain point, and this is my first story so be gentle.)