User blog comment:BlackTempest/Defense methods against the creatures of the Grim./@comment-15586611-20130816205612

There were a lot of people in the main hall when Ozpin gave gave his speech. Assuming a hunter/huntress can go through weaker grim as easily as Ruby does in her trailer, even 4 would likely be overkill for defending a city. While bigger grim might pose more of a problem, I doubt that they would be as numerous, and thus they could be taken down individually.