Let me add another possible clue to the “Robbie is a zombie theory.”
Look at his clothes. No, not the heart symbol. Take in the whole picture. Robbie V seems to be stuck in 2005-2007ish, when clothing like that was really popular. Really, no one dresses “emo” anymore. Perhaps he died in the mid-2000s and is continually stuck in that state.
It’s very subtle. Like it hasn’t been out of style for all that long and it can sorta blend in with the more modern clothing styles the other teens wear.