Ulaz was a member of the Blade of Marmora who disguised himself as a technician and helped Shiro escape from the Galra Empire once the Galra learned of the Blue Lion's presence on Earth, although Shiro lost memories of their encounter from a head injury sustained during his escape. Ulaz gave Shiro the coordinates to one of the Blade of Marmora's bases through coding in Shiro's prosthetic arm. He later returns once Shiro begins recollecting memories of the escape and informs the Voltron team about the existence of his rebel faction. Ulaz willingly dies soon after when Prorok attacks the team as a Robeast, sacrificing himself to save them from the powerful enemy.
It noticed that, After his death Shiro and Keith continue to honor his memory as well give Keith a better understanding about the Galra.