Comment by Hanz Deorico on Ghost Gate - Chapter 34

And I've also realized that only Gi Yoon can sew their human version or sm within the ghost especially the phantom who is possessing Manager Jung Yi Tae. The girl (forgot her name) can see the ghost side especially Managee Jung Yi Tae and Na Jumin. So I think that Gi Yoon always mistaken the ghost as Manager Jung Yi Tae since he looks like him and he cannot seem to see the ghost inside. Even if Gi Yoon can, he always has memory loss and can't seem to out the puzzle together since he is always confuse by the phantom who enjoys playing with him roughly (my opinion)