User blog comment:Bob the Wikipedian/The Verrat, the Reapers, and the Grimms/@comment-5059850-20120508023532

The Grimms have been known to sometimes aid the Verrat, and the Seven Families. However, I wouldn't say that the Grimms and Reapers are allies, more like how Edgar Waltz explained the relationship of the Hundjäger and the Grimm, "allies of convenience." They are not friends, but they do not hate each other. However, Nick seems to be a "different" Grimm than the others, not constantly cutting off heads, befriending Wesen, etc.