I love the expression! And the flower reminds me of an oriental lily, looks great together with the character. Too bad you couldn't finish the kimono, I could only imagine how it would look with your great skills in shading and detailing :3

As in the HB it is different than the B2, because it has a harder lead and gives a lighter looking lines. The bigger the B number, the softer the lead and darker the lines :> (At least that is what I have observed from personal experience)