The Sheriff of Pictoris
Humans are the newest arrival to the intergalactic community. While they have had space ships for hundreds of years and FTL drives for over two centurys humans are still considered a young race. The humans in the verse are very much like they are today both physically and socially. When compared to the other species Human come off a rash and prideful with a minor superiority complex.
Currently the Humans have colonized three star systems beyond the Sol system. In order of colonization there is Alpha Centauri, Sirius and Lalande but Humans are not limited to living within these systems. Once first contact was made and trade relations opened many humans left their native systems to live with their alien neighbors. Several generations of humans have grown up now in alien controlled territories.
The migration has not been one sided. As Humans moved away many aliens moved into the Human controlled systems. While they were welcomed by the majority their is a growing anti-alien movement within the largest Human colonies and even on Earth.