Matthew will be infiltrating as Majesty's janitor/cleaner/caretaker (whatever the term is), who also does spray paint art. So he'll be a cleaner who regularly defaces the walls of the school, go figure! The Angels this time around will be splitting off from Matthew to be pieces of magical spray paint art themselves, who are capable of moving from wall to wall and surface to surface, so they'll be roaming around the school grounds. (possibly they may still be capable of possessing Matthew as well; I haven't decided yet)

In terms of InfilCR, I'm definitely looking for CR with other members of Majesty's staff. CR with students could also be possible, although it might be more likely with the Angels (possibly they can be persuaded to pass along messages for the students?)