Rejion's are clever beasts, and they seem to breed quickly, they hunt in packs. They appear to be ruthless and very savage, as seen in Rejion trap made by Sarion and Rivolde Tribe, they eat weak and injured of their own species when given the chance. When hungry Rejions become more and more savage and violent. A pack of Rejions can hunt down a Yatsu Tiger with relative ease. Rejions are edible, as Noya demonstrated when he roasted and ate one complimenting the taste.