Kvurri

The Kvurri are a star spanning species in Astro City.

Physiology
Based on its first representative, Ambassador Telseth they appear to be giants clad in futuristic armor. Their faces are floating opera masks and its unknown it they represent the species or are in fact a proxy.

Culture
The Kvurri are highly advanced capable of creating doorways between worlds, simultaneously existing in one space while in another. They appear to be peaceful and understood that the show of force to other races was not necessary as they passively demonstrated that a mere door they created was able to withstand any assault by terrestrials threats.

Source

 * Astro City 001 (2013)