Yuuji Sajaki was an Ultra and a member of the crew of the Nostalgia for Infinity. While a chimeric, his augmentations were internal, including a host of medichines. Despite possessing a lithe build, he was capable of the same strength as the bulky chimeric, Hegazi, and was a good deal faster. "Sajaki" was a member of the Triumvirate that collectively ruled the Nostalgia for Infinity after Captain Brannigan contracted the Melding Plague. In practice, however, Sajaki captained the vessel, with Hegazi as his lackey and Volyova a minor annoyance.