As for other interesting facts, the jacket was a late addition, I was out at the store once a few weeks back, and I saw a jacket that looked almost just like this, and I felt it suited Ben pretty well.
silhouette of Vilgax towering over Ben on his hands and knees, with two bodies to either side: An adult male and adult female.]
[Suddenly, it snaps to Ben, with an anguished expression. A green flash consumes the scene, as it cuts to a large alien figure tearing Vilgax apart. This scene then zooms out to reveal Ben’s eyes in the present day, snapping out of his flashback and noticing he’s about to run his bike into a bush.]
Also Ben's parents is nowhere in the first 4 episodes of ExOS. As this is a continuation of Goodbye and Good Riddance, wouldn't he be living with his parents other then his Grandpa?
Also I believe Carth confirmed this on Discord once. So yes, the reason of Ben being cold and serious is because his parents died.
P.s I don't know why this dark text is here