aoi_ushi
Artist. He is well known for his original Land Strikers from Fuso Empire.
He always calls his witches by the tank names of Imperial Japanese Army.
e.g. Chi_Ha, Chi_To and Ke_To.
Most viewers regard them as the personification of tanks.
Japanese name: 葵丑 (Aoi Ushi or Aoiushi)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=313016