Artist.

Nickname: ise
Site name: iseism

On their pixiv profile page, the artist demands you that you should ask them for permission before uploading their work:

あと、ここに掲載されているイラストを無断で使用・転載はしないでください。必要であれば連絡ください。

See also

• Blog: http://iseism.blog.fc2.com/
• Pixiv account: http://www.pixiv.net/member.php?id=2136520
• Piapro account: http://piapro.jp/ise3601zasso
• Niconico account: http://www.nicovideo.jp/user/18397552
• Niconico community: http://com.nicovideo.jp/community/co1630402
• Niconico Seiga: http://seiga.nicovideo.jp/user/illust/18397552?target=illust_all
• Twitter account: http://twitter.com/ise0425
• Ask.fm account: http://ask.fm/ise0425
• Booth web store: http://iseism.booth.pm/