yasu_(defcon-1)
Artist. Formerly tagged as defcon-1.
Nickname: YASU
Old artist & site name: DEFCON-1
See also
* Pixiv account: http://www.pixiv.net/member.php?id=363042
* Twitter account: http://twitter.com/yasu_defcon1
* Home page (dead): http://defcon-1.jp/