Voladores

Los Voladores (Spanish for 'the Flying Ones') were a stateless, insular nomad society spread across the Orion arm. In addition to their realspace distribution, los Voladores also spent a large amount of time inhabiting blinkspace (how or why was unknown), which was the main contributing factor towards their abnormal physiological characteristics.
  Los Voladores primarily interacted with groups outside their own number by offering mercantile and, more rarely, diplomatic services. They were identifiable due to being universally taller and thinner than the average human, as well as wearing full-body environmental suits whenever seen by non-Voladores in realspace, which when combined with their general reclusiveness, made them the subject of a large amount of speculation and suspicion on the part of the rest of the galaxy.
  Union made first contact with los Voladores during the First Expansion Period in the form of unregistered spacecraft making peaceful encounters with exploratory vessels, which prompted the UAD to send investigators to establish contact and eventually open up diplomatic channels between Cradle and High Ground. Los Voladores were initially believed to be a society descended from one of the Ten, but this theory was eventually deemed highly unlikely.
  Los Voladores were recognized to hold essentially full autonomy and independence from Union, being given free passage through Union space and granted equal rights as other Cosmopolitan groups. Throughout the First Expansion Period, los Voladores assisted Union by providing planetary survey data that identified worlds suitable for colonization, and by occasionally serving as middlemen during first contact with the New Federation.
  Shortly after the establishment of the Union Colonial Mission under SecComm, los Voladores faced several hostile actions from the UCM, who had been tasked with unifying disparate societies under the Central Committee's new directives. Eventually, the mercenary group Vanguard Security was hired to outright invade and seize a Volador ship, which resulted in both failure and the swift retreat of all Voladores from Union realspace. Reports of Volador activity only resumed after the overthrow of SecComm and establishment of the more conciliatory ThirdComm, which resulted in a steady uptick in Voladores reappearing in realspace in Union territory.