Dost is an incredibly intelligent and highly skilled doctor that allows him to provide aid for his tribespeople. He is able to sense and detect all of his surroundings and knows when danger might be close with his webbed ears.
It is later understood that Dost’s home world contains a powerful energy like material that is incredibly valuable to other beings in the galaxy. With the material being discovered by a corrupt trading corporation, his planet is marked for colonization and is to be stripped of all assets. In doing so Dost’s people are enslaved. Dost flees his planet with an important asset and promises his tribe that he will be back to free them.