History of Righteous

Righteous is a seasonal armor set. A Season of Dawn-era guide says that each Resonance Rank-up on an obelisk grants a reward engram containing gear tied to that vendor, and it uses the Righteous set as its example. The guide does not confirm Mars-specific rewards, and the Mars Obelisk is covered there only in its unlock section.

A 2020 Bungie forum thread describes Righteous armor as a past-season item that was not in random drops, so sources differ on how the set was obtained.