"Orbo" is a green liquid that negates witch abilities. STN-J's hunters carry small vials of it on necklaces in the shape of a cross as a form of protection against their targets' craft. Hunters also carry air pistols which fire darts or pellets of Orbo that dampen witch powers when it enters the bloodstream of the target witch. Hunters who are craft-users or seeds can use Orbo without ill effects, although their own powers are reportedly diminished while using it. Robin, a craft-user herself, declines to use Orbo because she feels it is "disgusting".