Jumper is kinda Cowardly, often trying to NOT go on the front lines to save his own skin, he nonetheless still fights and is the best shot among them, a well taught weapons engineer he tends to see as a Smart ass to others (He is) but tried to be useful in whatever way, to help those in need.

Jumper tends to try and finds ways out of frontline combat and often works on Weapons or other upgrades for the other, Magnis and Claire often drag him into a fight against his wishes.