Deppo was a male from Eriadu who served as an Imperial Calibration Engineer on board the World Devastator Silencer-7 during Galactic Emperor Palpatine's attempted reconquest of the galaxy. As a child he developed a passion for repairing and dabbling with mechanical constructs of all kinds. However, he was very defiant and soon fell in with a local gang, which would eventually lead to him being kicked out of his home by his parents. Left on his own, Deppo began making a life for himself until an incident caused him to begin working for the Tarkin family.