Artist, mangaka.
Japanese name: γ·γγ©η«δΉ (Shihira Tatsuya)
Old name: η»η« (Garyuu)
Site name: G-HARD
Circle name: DRAGON LAND
(Some 2channel users have been claiming that this account was created by an identity thief and Shihira's real pixiv account is this; http://www.pixiv.net/member.php?id=185794 This account is currently tagged as s (joyk1214) on danbooru)