Board Thread:Speculation House/@comment-14138255-20151213162620/@comment-24099398-20151213165106

Neo's semblance is illusion, but it's possible that Merc or Em has a similar semblance. Possibly, they can create moving illusions, but only to a single person at a time (Yang), making everyone else see them as insane.

Neo, on the other hand, seems to create glass "walls" with images that everyone who's looking can see. They also seem to be still(as far as we've seen).