Bart and Billy Blaze (Patreon)

 Bart and Billy Blaze Fire demons recruited from legion CXVI, by clyde and the gang. While they lost the ability to project fire on their own, they remain immune to it. Swapping out their fireballs for flamethrowers and a boost to brain and muscle. After evolution and training they've become a bonded pair, and are never far away from one another. They're the ones the group turns to clear old castles and bunkers. Often joking and happily making puns accompanied by lesser fire creatures.