Yes, A.D. Nagisa. As I've said about a dozen times, including at the top of this page.
"A.D." is short for "assistant director", which in Japan I think is equivalent to a production assistant elsewhere. So my theory is she's a female wota who got a job with either TNX or the production company that does TNX's television shows and videos, and her wota-ism interested Tsunku so much — she geeked out every time he brought H!P members with him — that he decided to move her in front of the camera.