The Battle Drone is an enemy that will appear in Earth Defense Force 5. The battle drone seems to be similar to the UFO enemies from Monster Attack and Global Defence Force rather than the Gunship / Flying Drone enemy introduced in Earth Defense Force 2017, largely staying flat and level without the erratic movement of the latter.
It has a 5-way spread gun on its underside, using the same projectile model as the Earth Defense Force 2025 Flying Drone. This may be a placeholder effect.
It seems when aggro'd, they will light up in red, with their lights blue when they are idle.