This article/section is a stub, as of now! Help us make it better!
The Virus Data Gun is a gun made to take down a Giftia who has turned into a Wanderer. It can be used only by Spotters. At first it seems like a normal gun, but instead of shooting bullets it shoots a "rain" of virus data on the target, destroying all of the Giftia's programming, including memories. After a Giftia has received the virus data, it's impossible for them to recover (it's an instant kill), so that's why, as Yasutaka explains to Tsukasa, this gun is a "kind of last resort".