Hank POV
"Alex and Rei were the two closest-" I was interrupted by Alex suddenly appearing. Scott hugged him. "Alex how are you alive?" Raven asks. "It must have been Rei." I answer. I jump when I heard Rei's voice in my head saying, Sorry everyone
Raven and Alex must have heard it as well cause they also jumped, so I'm guessing it could only be heard by the original X-men. So Erik and Charles must have heard it as well.