Screw (スクリュー) is a Robot who lives near the tall tower, he spends his days playing Poker with Bolt and other Robots that used to work together before the Ruin.
|Behind the Scenes|
|Debut||The Woman of the Tall Tower|
|Voiced By:||Kyle Phillips|
Spring is a small Robot that has been heavily decayed by the Ruin, shown by his many cracks and scuffs. He has a single red eye and a brown design with extenable arms and wheels for legs.
Little is known about Screw's demenoer, it can be inferredd that he too has been driven to insanity by his actions towards Casshern for not playing poker, rallying behind Bolt for a fight. 
Before the Ruin Screw, Bolt, Spring, Plug, Lizbell and several other robots worked in a large parts factory. But after the Ruin began, Spring was driven into a long depression with his cardmates, who spend their days addicted to playing poker. While playing they are constantly harrassed by Lizbell, who they fear as the witch, one day standing in their way of getting a new recruit to play (Casshern).
Though his name was never stated in either dubs of the anime, Anime News Network and several other sites confirm his name is infact "Plug"