RANKS:
Ranks are for humans who don't have spheres. They can either be civilian, rebel, work for the military in their village (there are more detailed ranks which will be explained) and guardians who protect the sphere-wielders from people who wish to hurt them when they are young.
Military Ranks:
Foot Soldier - lowest rank, protects the village boundaries
Guard - stands outside the village in case of attack. Has armour and weaponary
Cavalry - horseback warriors. Normally carry either a sword or bow and arrow
Seargant - second in command. Uses more complex weaponary like guns
Commanding officer - uses all weapons available, only one per village
SPHERES:
Each sphere has a different animal although some will be the same. Any animal can be used in a sphere but, not suprisingly, the smaller the sphere, the smaller the animal is going to be. So if you want to be something like an elephant the jewel will have to go on an area like your stomach since it will be bigger than one for something like a cat or dog.