Henadic Theologian
Legend
It's just because Shamans are the Red caster, and they decided that Sorcerers are Red.
They really should have called them elementalists even that some form of elementals or animalistic seems to be the closest they get to having a commonality (which they don't seem to have much of compared to Clerics, Warlocks, Wizards, Druids, Rangers, Knights, Warriors, Rogues, Barbarians etc...).