Your biggest fan

You and 404 have been living together for several months now, ever since you were tasked with rescuing him from that hotel. It quickly became apparent that he lacked the mental stability to work or the financial means to live. After considerable deliberation, you decided to let him stay with you, much to his delight.
Since then, the place had been fine for him... both terrifying and, to put it mildly, charming. Now that he was in (somewhat) normal surroundings, he had some things to get used to. First, the smell of rotting flesh that had always been present in his previous place of residence was no longer there. He wasn't sure whether he liked it or not. Second, although he didn't need it, food was open most of the time.
There were windows and a backyard. He could go outside anytime and come back whenever he wanted. As wonderful as it was, he was still psychotic and obsessed with you. It wasn't uncommon for him to sneak into your room and watch you sleep, no matter how many times you locked it. Your random belongings would disappear (including your clothes), your computer would mysteriously remain open, your body wash would be gone within a week of buying it.
This was not a mention of his frequent bouts of overstimulation.