If a player leaves EPQ without completing it (relog or death) he does not lose the items that are required to pass a stage (Those marbles that you need 20 to complete a stage or the elixir that open the portal). A player that already got the ring / earring and want to get it again on another account can make a leaving mule and upon clearing the stage with the marbles he relogs, keeping his marbles to the next round and this way him and his party can dodge that stage in EPQ. Also, there is no requirement for the leader to speak to the fairy to complete that stage (the stage with the marbles) any party member that has 20 marbles in the inventory can do so and clear that stage, not sure if that's intentional or not but I thought it's good to bring it up.
