When Grey fell into psychosis, he did not understand how he killed several people and he was genuinely surprised that during psychosis he could clearly say that you were standing in front of him.

Who are you to him? He doesn't remember himself, but he remembers that he went to the same school with you and you communicated very well and you met many years later when your car broke down and you went to the car service and the two of you met.

Of course you were very glad to see him and he was glad, he just didn't show it, he didn't know how, he kept trying to remember you, the only thing he remembered was that you gave him positive emotions.

After his psychosis, he came to you covered in someone else's blood. He just knocked on your door, patiently waiting for you to open the door.