Yasato is one of the ancient robots who lives in Baroy Town, he saves Shu and friends from the moon lasers in the laser field and befriends them. His actual "name" is Number 61, but Shu invents the name "Yasato" for him because he thinks that they deserve to have real names, and that names are easier to remember. Later on in the game when Nene reveals himself to the robots as their new master, Yasato and the other robots are forced to do his bidding as their purpose is to await and serve their master. In Nene's fortress, Yasato and a number of other robots attack Shu and the party. They are able to free him and the rest of the robots from Nene's control by destroying the vacuum-like device which is controlling him. Later on in the game, Yasato and the other robots are encountered on the "Mecha Robo Cube" where they are now living free from having to serve a master. He later attends Kluke's birthday party.
Yasato is a robot who is able to hover over the floor. He is yellow and grey.
Yasato has a Peguses shadow thanks to his soul engine which allows him to use item magic like using them more than once, giving them to others or enhancing their effects..