This artist tag is currently linked to two accounts. Not sure they're the same person.

1) Chinese artist

• Nickname: observerz
• The other names: bird-z
• Pixiv image server URL: http://i2.pixiv.net/img02/img/observer/
• Site name: 蘿莉國的蘿莉亚克西
• Blog: http://blog.sina.com.cn/observerz
• The other URL: http://blog.sina.com.cn/u/1273447657
• Lofter gallery: http://observerz.lofter.com/
• Pixiv account: http://www.pixiv.net/member.php?id=19932
• Tinami account: http://www.tinami.com/creator/profile/5776
• DeviantArt account: http://observerz.deviantart.com/
• Drawr account: http://drawr.net/observer
• Sina weibo miniblog: http://weibo.com/lolipartycn
• Twitter account: http://twitter.com/observerz
• Twitpic account: http://twitpic.com/photos/observerz
• Drawtwit: http://drawtwit.com/observerz/
• Old DeviantArt account: http://bird-z.deviantart.com/

2) NSFW artist

• Nickname: "Photon cannon" or "LO"
• Pixiv image server URL: http://i2.pixiv.net/img46/img/observerz/
• Pixiv account: http://www.pixiv.net/member.php?id=1577252