ishikawa_kuma_yarou
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)
Aliases: none