Artist. Formelry tagged as [[mizu_youkan]].

Japanese name: 水羊羹 (Mizuyoukan or Mizu Youkan)
Old name: 水ヨウかん (Mizuyoukan)

g4.See also

* Pixiv account: http://www.pixiv.net/member.php?id=1462361
* Pixiv novels: http://www.pixiv.net/novel/member.php?id=1462361
mizuyokan (ikaga desuka)