164 years ago, it was springtime on the planet of the Terugans. The treeforms were in blossom and the children were playing among them. However, not all of the children liked to play innocent games like Catch the Gronoes. Some of them, like Yon, spent their time stealing parts from vehicles and hiding them from the adults.
Yon was three years old when he first took up this hobby, and he was much taller than his friends. Sometimes he would go out with them part-stealing late at night, leaving his parents continually concerned for his safety. Not that he cared what his parents thought; he considered them worthless, nagging lifeforms.
As a result of his parents being too timid to tell him to stop stealing the parts off of other people's machines, Yon continued this behavior through to adulthood.