Who was He?

There are four friends who go for a walk in a fort, but during this time something happens to them on the way that their friends disappear one by one.There are four friends who go for a walk in a fort, but during this time something happens to them on the way that their friends disappear one by one.There are four friends who go for a walk in a fort, but during this time something happens to them on the way that their friends disappear one by one.