Three of them were made into familiars by Rou, to be used as mounts for Parabellum's leaders like Kichi and Sei. Rou also has one as his own mount which ranked up to an Oniguma.
- Kumajirou and Sei's: Hind Bear → Oniguma → Desolation Spirit Panda
- Kumakichi: Hind Bear → Oniguma → Steel-armored Great Bear
- Hind Bear → Four Armed Bear
Here is the evolutionary tree of the Hind Bear.