- Flamethrowers were used in the War between the Royal Empire and the Republic of Frost. All 908th H.T.T. soldiers were equipped with a flamethrower as their main weapon.
- A flamethrower is a mechanical incendiary device designed to project a long controllable stream of fire. They can be vehicle mounted or man-portable. The man-portable flamethrower consists of two elements: a backpack and the gun. The backpack usually carries a combustible liquid or gel held under pressure, which was released and ignited when the operator fires the gun.
- It was originally intended to use flamethrowers to burn down bushes, brush and barricades in way of advancing ground troops. But people realized it can be used to inhumanely kill civilians. Afterwards, it was banned by international convention because of the brutality. Despite the legal banning, Hans uses his flamethrower.
- Hans mainly uses the flame thrower at a close range to directly set his opponent on fire. He also uses the technique of spreading fuel on water surface and setting fire on it to create a wall of flames.