Hayato is one of Amuro’s best friend in Side 7. He joins the White Base crew to prove that he has much use as anyone else. He teams up with Ryu in the Guntank and they both make a good team at taking out Zeon Mobile Suits.
After the One Year War, Hayato marries Fraw and adopts Katz, Letz, and Kikka. He becomes the leader of a resistance group called the Karaba on Earth and they associate themselves with the AEUG. He uses old technology from an old Flight museum he has for his attacks against the Titans.