Aries

The 2nd Star Dust User, born into an era of history called "The Era of Trial." 

He is the only User to be directly related to a former user, being the descendant of Axis. Despite this fact, he is incredibly different from Axis in both fighting skill and mentality. While Axis is much more concerned with precision and efficiency, Aries is much more about rushing down and overwhelming his opponent. He often tries to fight Axis for unknown reasons, but because of their combative differences, Axis is always the one who comes out on top.

Aside from combat, Aries is very kind but at the same time has an incredibly short temper. He respects his fellow Users and sees them all as his comrades. He does enjoy sparring with the other Users. While he doesn't understand it too well, he also loves to inquire with Maple and Lumenis about their experiments, seeing knowledge as a valuable thing to have. He for some reason insists on Vizor staying away from Axis, even sometimes dragging him away from Axis if he thinks something is even slightly off.