They needed to injure Lucifer before he could attack them; otherwise, it was going to be dangerous.
"You also start firing at him!" he said to the pilot, commanding him to use the weapons of the helicopter as well.
The helicopter had a rocket system since it was a military helicopter. It also had rapid-firing guns at the bottom. As the missiles took more time to fire than blindly shooting from the rapid-firing gun, Flourance chose the guns.
Among the three helicopters flying, only Caen's helicopter didn't have a weapons system since it was a different one that was especially brought to carry the heavy cage.
The first and the third helicopters were the only ones that had weapons, which was why Caen didn't simply blow them up himself.
