Rabbits says:
Quintus sounds like an interesting character. Is it widely known that he botched a ritual and got an Arcanist killed? Does he go as far as to send money to the surviving family?
I think it would be widely known that an Arcanist died, and it might be fairly well known that Quintus did some work for them in his capacity as an artist. My sense is that outside the Arcane Order, fairly few people would know that the mages employed protective tattoos for some rituals, and that Quintus screwed up one of these tattoos. Probably the dead person's family, if he/she had one, wants nothing to do with Quintus, so he serves as a Guardian as a more abstract form of amends.
Regarding equipment,
Maze Rats does seem to care what tools you have at your disposal, and where you're storing them. So we should probably track it. That said, I'm happy to go with whatever level of detail people want.