You say you're having trouble finding valid information, but what sort are you looking for? When you say "Mana-style" do you mean the Gothic Aristocrat and Gothic Lolita look that Mana influenced with Moi-meme-moitie or that specific brand and style, which Mana dubbed as Elegant Gothic Lolita? Are you trying to find out more about the history of the style or about Mana himself? A little more input would be appreciated.
"And we are all told from the moment we open our eyes, that everyone is entitled to his or her opinion. Well, thatís horsepuckey, of course. We are not entitled to our opinions; we are entitled to our informed opinions. Without research, without background, without understanding, itís nothing. Itís just bibble-babble. Itís like a fart in a wind tunnel, folks." --Harlan Ellison