Spear v1.5 (AxC)
Spear v2.0 (S.U.H. 2)
Spear v3.0-Perfection (S.U.H. 3)
Spear v3.5-RE:Perfection (S.U.H. 4)
Satomi Arai (S.U.H.)
Tomokazu Sugita (S.U.H. 2 & AxC)
Nobuyuki Hiyama (S.U.H. 3)
Fumihiko Tachiki (S.U.H. 4)
290lbs. (S.U.H. 4)
Black (Sleep Mode)
Red (Battle Mode)
Rikuo Saiga (creator), Wataru Taro (assigned partner)
"All battle systems, green, commence battle"
It has no emotions, thoughts, or feelings, it is a robot with no personality and only responds to talking when needed.
It was designed and created by the S.U.H. founder, Rikuo Saiga. Its prototype was named Sword, but was easily destroyed during fight simulations due to lack of speed, reach, and fight processing. It was later rebuilt as Spear and had succeeded in the fight simulations and was later put into the Strongest Under Heaven tournaments, being upgraded each year.