Lurald is a puppet controlled by Leonof the Puppet Master. Not much is known about his true identity, but he was likely a human who was killed by Leonof and turned into a puppet by his diabolical hands. Lurald was used by Leonof as the leader of a small group of terrorists to test Vash's limits during their confrontation. In the anime, for some reason, he is Leonof's main puppet and has numerous copies. (Source: TRIGUN Wiki)