Got the idea after watching the anime-Sol Bianca or Balco Del Sol. Such a cool anime. This girl is one of the main characters, the weapon she carries is supposed to be a computerized war machine (its supposed to be bigger) with something user interface thing, it can shoot the usual ammo as well as launching grenade.. All action controlled by your brain, done with the masker thing on her head, so actually there's no trigger needed. nice eh? :)