I think it'd be neat if Ayu came out with her own perfume, I'd definitely buy it! I think she would come out with 2 different perfumes. We know how Ayu can be cute and girly, and then also be classy, sexy and elegant.
One would be a light floral scent to reflect her cute and girly side, and the other would be a muskier scent, including sandalwood and rose.

As far as the name, I think her A symbol would be enough. Maybe the lighter scent would be called "A Day" and the sexier scent would be called "A Night" or something,