A missing artist. Creator of Akatsuki Makoto.
Had the same Pixiv username as Null (nyanpyoun) (and, both are obsessed with anal sex), but different Pixiv ID and nickname. Not sure they are the same person.
Nicknames: NP (エヌピー) or NPS
Site name: 枝毛の狭間 (Edage no Hazama)
https://www.pixiv.net/users/90507
https://www.pixiv.net/stacc/nyanpyoun
http://mixi.jp/show_friend.pl?id=5811621