Here we have Perun's cohort. I decided to go with his younger brother instead of the shaman of his tribe, since I didn't want to deal with a spellcaster when handling multiple characters. Karan is a scout in his brother's tribe, and intensely loyal to his older brother with no designs to take over the tribe of his own - he's happy to just lead the scouts.
I don't want to go through all the trouble fleshing out the followers, but I would say they'd be a bunch of tribal types, whether barbarians, scouts, or shamans of the tribe, whatever...just villagers who left with Perun and Karan during the schism.