We know Abby isnt the killer because why would the killer say "Whoever is doing this is obviously after me?". She also seems to be the girl that the series is pretty much being based upon. And like any horror movie, Abby is the main girl and the main girl is always the soul survivor.
Henry. Dont know much about him really. He seems to be protecting Abby.
Cal:
Chloe:
Trish: Why would you kill your own wedding guests?
I think all signs are pointing to Chloe.
But those 5 are the main characters anyway

















