During David and Laurel’s travels, Laz joins them for a bit and explains in his own way with Laurel’s help that Laz is short for Lazarus who was brought back from the dead by Jesus Christ. Apparently Jesus had requested that Laz wait for his return once he was done having supper with his twelve friends. So Laz waited, and waited, and waited. Eventually he had found that he had fallen through the cracks and was the first to find the In-between.
Laz is immortal and subject to divine intervention for protection. On more than one occasion Laz’s life was endangered and an Angel with a flaming sword appeared to defend him.