The chances of bloodmoon killing OIIAI happening are very slim. You barely get to use guardian devil.
#Guardian Devil (Impostor Ghost)
fringe basin
undone nexus
If a ghost role kills oiiai their role dosent erase
fringe basin
If a ghost role kills oiiai their role dosent erase
That will change very soon. Someone already reported about a hawk killing OIIAI, and their role did not change to a standard guardian angel.