was once a "crash dummy" used by Iwagakure in order to create a new destructive force, that would be used as the ultimate secret weapon. He was kidnapped from the infirmary of Konoha, after he was said to have posses his clan's most notorious insects. After the kidnapping of the boy, he was held in small home with a fake mother, and he would begin to learn the Explosion Release. Around the age of 15, the boy showed extraordinary skills with his Explosion Release and his bugs, where he earned the name .