The Seven are not monsters. Not devils in cupboards. This is Declan Marsden's formulation, delivered to Daniel with the flatness of a man who has spent nine years learning to say it without flinching: they are a category. A pattern that someone at Beowulf noticed decades ago — men moving like they'd been wound up together, officers giving orders they'd only half-thought already, civilians doing violence they'd already pictured. Seven of them, almost every time. Like something was counting through them.
The name started as a joke. Now it is what you say when choice isn't entirely choice. The Seven correspond to the seven deadly sins in the Binsfeld taxonomy — each bound to a domain, each operating through human weakness with the patience of something that has been doing this longer than recorded history. Their command structure, Council-7, was fragmented in the 191█–191█ period by a joint Beowulf–Heaven action.
At the time of Cambion, Amy designates them as contained — for now. For the fuller mythology, see The Seven in the Cosmology archive.