So @cheust made me think of Something
So I went into Spider!Phantomhive!reader's past on what led them to make the deal with Sebastian.
Spider!Phantomhive!Reader acts like nothing bothers them but you can't pretend that there are things that linger and some of them lead to having things to avoide a repeat of said situation like Spider!Phantomhive!reader not being too far from Sebastain in public areas mainly overcrowded areas.
But if fear gas that it fixed to where it can work on Spider!Phantomhive!reader than Damian would become protective and if he needs to will make a deal with Sebastain behind Spider!Phantomhive!reader's back.
And when Damian finds out what happens he reports back to his mother and asks her to trap down those people and anyone else involved with that group.
And I can see him having Ace,Goliath and Titus watch over Spiderphantomhive!reader......though they do have a demon at their side nearly at all times.
Though that doesn get me thinking on how Damian would react to Pluto
