Artist. Likes Konpaku Youmu.
He has/had several pixiv accounts. Not 100% sure, but the accounts listed below are probably the same person.

• Name (1): どりる魚 (Drill Uo)
• Old name: 猫舌魚
• Circle name: ドリルくちばし (Drill Kuchibashi)
• Pixiv account: http://www.pixiv.net/member.php?id=5791742
• Stickam account: http://www.stickam.jp/profile/sakasamanochou
• Twitter account: http://twitter.com/karinuinochou
• Twitpic account (stopped): http://twitpic.com/photos/karinuinochou
• Ask.fm account: http://ask.fm/karinuinochou
• Nijie account (empty, unconfirmed): http://nijie.info/members.php?id=110036
• Pixiv userID & image server: karinuinochou & /img118/
• Name (2): 借猫 (Karineko) (guro account)
• Pixiv account: http://www.pixiv.net/member.php?id=5248245
• Pixiv userID & image server: oppaimaister & /img116/
• Name (3): 子子子子 (ねねねこ, Neneneko) (for original-themed art)
• Pixiv account: http://www.pixiv.net/member.php?id=10516973
• Pixiv userID & image server: sakasamanochou & /img142/

• Name (4): さかさま (Sakasama)
• Pixiv account (deleted): http://www.pixiv.net/member.php?id=3499781
• Pixiv userID & image server: karinuinochou & /img84/
• Name (5): 仮犬 (Kariinu) (reading is a best guess)
• Pixiv account (deleted): http://www.pixiv.net/member.php?id=4236315
• Twitter account (deleted): http://twitter.com/sakasamanochou
• Twitpic account: http://twitpic.com/photos/sakasamanochou
• Pixiv userID & image server: sakasamanochou & /img99/
• Name (6): かりぬい (Karinui)
• Old name: ぺぺ太 (Pepeta)
• Pixiv account (deleted): http://www.pixiv.net/member.php?id=160094
• Pixiv userID & image server: sakasamanochou & /img13/