User blog comment:Biscuitmix/Leviathan of Dis/@comment-1679409-20120827193521

If Leviathan is the Leviathan of Dis, and Leviathan is against the Reapers, then I don't see he/it would also indoctrinate batarian scientists, which hastened the downfall of Khar'shan. That obviously helped the Reapers as a whole. That's not to say that BioWare can't find a way to explain it, though.

Also, I've heard a theory that says Leviathan isn't even a Reaper but a member of the race that created the Reapers.