Meridius was born into the same family as his older brother Corion. Too young to follow Corion when he left, Meridius bided his time until he too came of age. Then he set out at once following his brother to Rhudaur. He tracked Corion as far as Thuin Boid, where he found his brothers former party, and learned of his death.
He threw in with his brothers old friends, and was with them when they discovered Corion as a vampire. He was distraught at the thought of slaying his own brother, but knew it had to be done. Then Doria, the parties dwarven scout, came up with the idea of finding a cure for vampirism. Meridius has now devoted himself to this pursuit.