That's a community manager for Deep Silver, publisher of the Saints Row series. IdolNinja is also the creator of the Gentlemen of the Row mod.
This tweet has led to wild speculation that the source code for the PC port of Saints Row 2 may have been found, which could make a remaster of SR2 economically feasible.
Reaching that conclusion is crazy speculation, but it would be really great if it were true.
Dammit, IdolNinja, you had better not just be trolling.