Leader of doujin item circle, Torico Trick. He usually Commissions other artists to make designs for his doujin goods. You can find the real artists on his pixiv commentary.
Nicknames: 石川クマ野郎（仮）, 石川そに子（仮） or アイスソード（仮）
Circle name: とりこトリック (Torico Trick)