This Nightmare-class battleship is an envoy from the Vimoksha Chorus, a faction that is an offshoot from Sansha's Nation. The vessel appears to be on a mission connected with a Templis Dragonaurs staging facility and may be carrying advanced technology of some kind.
Led by the self-styled "First Citizen and Paramount Warlord" Cornelius Sedek, the Vimoksha Chorus is a rare surviving faction from the time following the suppression of Sansha Kuvakei's Nation by a CONCORD-led coalition in YC37. While many surviving remnants chose to heed the call of Sansha, following his reappearance at the head of Nation in YC112, Citizen Sedek declined to submerge his following back into Kuvakei's fold. No longer a "True Citizen" of Sansha's Nation, Cornelius Sedek remains committed to much of Nation's ideology, although he has taken it in a direction that may be considered extreme even by the standards Sansha Kuvakei.