Board Thread:Lore Discussion/@comment-1852943-20130424155230/@comment-10167444-20130530015331

If that's true, maybe the Pinwheel was a part of the Darkwraiths as well. And, if you want to stretch it that far, that would mean he could have had a hand in the ordeal in New Londo.

But, again, that's a bit of a stretch, as there's really nothing in-game to back that up. Except, maybe, for the Darkwraiths surviving underwater for so long.