the 2199 series Kodai is depicted as a young, freshly graduated cadet officer and is promoted suddenly to command the tactical division of the Yamato when most of the junior officers are killed by Garmilas aircraft bombs immediately prior to boarding the Yamato. He matures quickly as one of the bridge crew on the Yamato and is the first to fire the Wave Motion Gun. After an initial confrontation with Okita over his brother's death, he forms a bond with him, who was his brother Mamoru's former mentor. Okita encourages Kodai's independent streak and he takes on Okita's aggressive tendencies in battle tactics, most notably disobeying Sanada's orders and developing anti-submarine tactics during their first confrontation with the Garmilan dimensional submarine. He and Operations Officer Yuki Mori become romantic partners over the course of the series and become engaged before the start of the 2202: Warriors of Love series. After the Yamato crew are summoned to Telezart by Teresa, Kodai gather the crew to rebel against the Cosmo Navy and steal the Yamato from dry dock where the ship had been rebuilt. Sanada gives Kodai command of the Yamato, noting that Kodai is a leader where he is not. Kodai struggles with command as he is still in his mid-twenties and placed under great strain which is only relieved when Admiral Hijikata accepts Kodai's offer of command as the ship approaches Telezart. Later when Yamato crashes onto Zemuria, Kodai is one of the few left behind when the crew abandons ship and is devastated when Mori loses her memories of their time together. Kodai offers his life to end the conflict during a confrontation with Dessler and Mir but Mori takes the shot intended for Kodai. After the Yamato is rebuilt it becomes the spearhead of the final assault on the Comet Empire. Hijikata is killed during the assault and Kodai takes command, storming Emperor Zworder's throne room with Yamamato and the Marines. Surviving this personal encounter with Zworder, Yamato is abandoned once again. Kodai and Mori use the Yamato's failing wave motion engine to destroy the Ark of Destruction and Zworder. Months later the Yamato reappears within the time-displaced Time Vault. The missing Yamato is found on board revealing Kodai and Mori are alive within the higher dimensions. Kodai feels no desire to rejoin humanity and is seemingly willing to walk aimlessly in eternity and Mori is unable to