Board Thread:Off Topic/@comment-26397825-20150713052232/@comment-25396609-20160107232045

Grimm kill humans and faunus indiscriminantly, we have not yet seen any divergence or preference for one over the other and have no reason to believe they would. The fact that they torture prey also violates basic grimm behaviour, as they go for the kill by nature. They are not sadistic, they are bloodsthirst.y

We have no reason to believe grimm in different regions have specific colors, since the same base colors are present in all grimm in different quantities, no need to justify it being predominantly grey over black.

They wouldn't be aggresive to other grimm, that defeats the purpose of grimm and goes against their base instincts. At best they would be solitary rather than group predators, wtihout being aggro to other grimm.

You mention they cover themselves in ice. Question is, how? By what method do they do so?

I have said it before; we have no indication that one type of dust is more effective against any given grimm than another, given they lack normal biology. As such the effectiveness of a given type would be based entirely on environment; such as electricity being more effective in water, or fire more effective in a dry forest.

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tl;fr: no preference for prey, no torture, remove needless justification of colors, don' have them aggro to other grimm, explain the ice armor thing, no elemental weaknesses until we have canon evidence of it.