now i haven't seen anything official with the Arc names but as far as i can gather these are what are used here for the earlier storyL
Ghost of Mateel
Vampire in the Castle
Attack on Headquarters.
that's all fine and i'm happy with that but after this point it all get a little hazy and the are all sorts of different names for different parts of what is basically the same story.
Unless anyone has objections (please commentif you do) i will change the Ark name for events from after the Komuvitan D incident to present and the Third Exorcist Arc.