"Figured I'd backpack for a semester 'til I figure out what I really want to do."
By the end of the movie, however, he's a fully-fledged member of Team Allied Powers, which is sweet, because that means we had two gods on our side.
As it turns out, Chief isn't some random guy, but a bona fide demigod. When he's recruited by Steve and introduced to Diana, they briefly converse in Blackfoot, and it's the only time in the movie that a foreign language isn't subtitled. And because only a few thousand people speak Blackfoot, the odds of anyone leaning over in the theater to ask someone to translate was rather low.
But that lack of subtitles was intentional, because what was said would have blown the minds of everyone both on and in front of the screen. As Chief and Diana converse, he casually lets it slip that his name is Napi, which so happens to be the name of a demigod worshiped by the Blackfoot. In the tribe's mythos, Napi is a trickster god and troublemaker who likes nothing more than fucking up people's shit. By comparison, Chief is a smuggler who peddles arms and goods to both sides of the war, thereby creating his own style of trouble. The actor himself, Eugene Brave Rock (Best. Name. Ever), has come out and admitted that Chief is indeed that trickster god, set out to sow chaos and fight against those who think they can control the world for themselves. Sounds like he's exactly the god they need, then.