Artist.

Japanese name: 勇河 聖泉 (reading is given as Yuuka Seisen)
Pixiv & Tegaki nickname: かーど (Card)
Site name: Re-card

See also

• Blog: http://recard.blog.shinobi.jp/
• Pixiv account: http://www.pixiv.net/member.php?id=328394
• Tegaki blog: http://tegaki.pipa.jp/68193/