I’ve talked soooo much about the Powers but I’m going to talk about them more: we’re told in both the Virtue and Providence’s entries that they were sent by Heaven for a specific task— Virtues to punish sinners, Providences to find Gabriel, and we’re told that the lesser angels specifically are the ones always sent to Hell because nobody created in Heaven wants anything to do with humanity. And then you have the Powers, who have no such task listed in their entry, who are greater angels who wouldn’t have been sent anyways. You could make the argument that Heaven felt finding Gabriel was urgent enough that they broke tradition and sent the Powers, but also, the Council before their deaths stripped Gabriel of his titles and pronouns, and the Powers break into Fraud still calling him he/him and still treating him with nothing less than absolute reverence, which says to me that they came in of their own accord.
And Gabriel’s influence! The Powers’ battle moveset evokes his, yeah, but also, the taunts! Studying someone’s fighting style and trying to emulate them in that way is one thing, but it’s fully another to emulate how they talk— it implies Gabriel trained them personally, and the Powers according to the Terminals are his most numerous followers! (They notably insist a lowly thing like you could never have beaten him— gotta wonder if their response to the Council’s death was to insist the Council was wrong to cast out Gabriel, though not because his loss was not a betrayal, but because they’re in denial that he lost at all? We’ll probably never know.) Previous stuff on the Ferrymen show us Gabriel also interacted with them and tried to tend to them personally; the Powers tell us that that wasn't specific to the Ferrymen's efforts to emulate divinity, that's just how Gabriel was by default.
We saw in the other layers just how much Gabriel was an influence on the sinners in Hell, and we’re told through the Terminals that it was similar in Heaven, but it’s different from seeing it ourselves— the Powers are such a succinct way to show how much Gabriel cared, and our first visual understanding that Heaven did love him in a way.