In the walking dead season 4 episode 10 After, there is a scene where Michonne gets back to the prison and sees nobody there. Then, she uses her old technique of camouflage and uses two trapped walkers as protection by tying them with ropes and cutting their jaws and arms.
Then several walkers walk with her as she is also a walker, Then she is taken aback by the sight of a specific female walker, as it physically resembles her. After a while she again saw the walker and then she kills all walkers beside her including her pets.
Who is the walker? The hairstyle of the walker and Michonne looks the same, so she could be in any relation. But I didn't find anything to prove it.
Is she really saw her or was that a hallucination? and who is she really?
I didn't watch further episodes.