amamizu (myofuu kai)
Artist, sole member of the circle Myofuu-Kai (Myofū Club).
Better known in the west for his artwork in the doujin game "Touhou Soccer" and it's sequel.
Japanese name: 雨水 (reading is given as あまみず Amamizu)
Niconico name: sirai
Circle name: みょふ～会 (Myohū-kai or Myofuu-kai)
