If you have not read the initial post, “say hello!” or participated in the name selection poll at ふたなり茶 then this will be of benefit. Any and all information regarding that Futanari Girl on futanari.org will be made available here.
Once upon a time, I (3pyon) asked M77 through e-mail to procure an image request. Indirectly, the question was to provide a mascot character illustration. While the direct quote is available in the blog article, elaboration is below.
The character's name is 双葉 成美 「Futaba Narumi」 using Japanese name declaration (人名 jinmei).1)