A boy that was saved by the scientist from Granblue after they found him on the verge of death on the beach due to storm. Unlike monster frank who was modified with majority of his body in machines to make him specialize in combat, the boy was given a machine to fill in the missing parts but he's still human. Even though he does not have any blood relation with monster frank but due to their similar situation the boy feels affinity to him and loves to stay beside him.