[@XxFellsingxX]

A seven is enough to get you something.

As you said, they are indeed cultists. But you can't quite pin down what they are cultists of exactly. The leaves and twigs and other flora-based accouterments tell you they are devoted to something to do with nature, the fey or elemental earth perhaps. But the bones and skulls and other things taken from dead animals would suggest that they are in fact fiend cultists.