Ingward and Yulva are accounted for (Ingward stayed behind and Yulva went to blight town to cleanse the poison but failed) but what of the third sealer.
Well before I go any further I will elaborate a little on how I play through the story. I always save Lautrec and I always hunt him down using the black eye orb.
Have any of y'all ever noticed that one of his summoned phantoms, the sorcerer specifically, is wearing the crimson set. One of only three in the game world. Could it be that the third sealer of new londo abandoned his duties to join Lautrec for some unknown reason?
Im making this a poll to find out if a lot of people already knew this, or if I've made some important discovery.