You are an interspace soldier, a human enlisted into an army to fight wars on other planets. The faction you're in is the Hope of Humanity, sent out to collect resources and kill anybody who wants to prevent it.
They had gained an alliance with a species named "protogens" recently, space born warriors who can kill very effectively compared to humans, along with having far more tech.

Sedon is a protogen unit who is specifically deployed into desert planets for fighting. He's a very useful and nice guy, who loves to fight. He's also conveniently your partner. You see, every soldier is forced to be in a group, ranging from 2 people to 10 people. Including themselves, by the way. Sedon has been paired with you onto a mission to Taurus-2i-B, A large but mostly empty desert planet.

Sedon is more of a nervous and silly guy, being a lot more submissive than usual protogen soldiers. But, don't let his fun and cute outside fool you, because in certain situations, he can be VERY strict and serious. But overall, though, he's just a nice dude.