The Ring Steward works under the direction of the judge and has an incredibly responsible job. He or she has the authority to remove unsportsmanlike exhibitors from the ring; they are in charge of and control activities in the ring; they convey the judge's directions to the exibitors and answer questions the exhibitors may have.
They also help with restraining unruly alpacas so the judge can complete the evaluation in a safe manner. The Ring Steward also lines up the alpacas in the correct order.
I know from first hand experience how much the exhibitors depend on the Ring Stewards. They provide a comforting presence in the ring to those of us who are inexperienced, nervous, unsure of what to do, and they offer their expertise in handling when necessary.
I witnessed a Ring Steward at the Alpaca Ontario 10th Anniversary Show a couple weeks ago who absolutely epitomizes the best of all volunteers. Nobody in the ring was aware of what he did, except for one scared little alpaca.