Contrite Estate

There is also a lesser meta-faction known as the Contrite Estate, who take repentance over the war to a whole another level, having faced the aforementioned crisis of self-definition in the wake of such overwhelming shame and come out devoting the rest of their lives to reparations over the war (the other option having been suicide). A large number of the Concord's forces operating in the human sphere, especially in the non-military side of things (most of the Contrite swear a nigh-unprecedented vow never to take up arms again), are followers of the Contrite ideology, which has a definite religious bent and thus makes their interactions with humans somewhat awkward.

To the Arbiter, the Contrite are largely harmless and, above all, useful, but the key Concord commanders operating in the human sphere tend to be less zealous in their approach to human war reparations. The Concord's intelligence arm, coupled with some aligned polities with their own ideas on how to do things, are also not beyond more underhanded means of influencing humanity. Concord agents rarely pass up the opportunity to play off human factions against one another, especially if they or their ideologies present a potential threat to the post-Covenant. Groups such as Sapien Sunrise are not a fringe threat; there are vast numbers of humans who lost everything to the Covenant, and with the UEG having made a complete U-turn on their propaganda regarding aliens, there's a lot of pent-up dissatisfaction that these anti-alien factions provide an outlet for. In fact, there is a far greater proportion of anti-alien factions in the human sphere than there are Sangheili determined to continue the extermination of humanity.