A prior member of the Alliance’s mobile suit development team, all of whom disbanded and fled the project after completing the Tallgeese and designing Wing Gundam Zero, and eventually set up development on separate colony clusters and Earth. Instructor H (Colony Cluster L4) was befriended by Quatre and constructed the Gundam Sandrock. He is short, with dark hair, a receding hairline, and a thin mustache. For more background information, read Quatre's chapter in the Episode Zero manga.