Artist. On his/her pixiv profile page, this artist wrote his/her opinion about re-uploading his/her images.

Japanese nae: ぴたぁ (Pitaa or Pitar)
Circle names: さんぽ日和 or ちはぴた

See also

• Pixiv account: http://www.pixiv.net/member.php?id=1086590
• Pixiv sketch account: http://sketch.pixiv.net/@pitter
• Privatter account: http://privatter.net/u/pitar0305
• Twitter account: http://twitter.com/pitar0305