Every drone used to be a person before they were assimilated into the hive. Once a drone spots a human, they will advance upon them. The drone will try to spray a thick white goo onto the human from their mouth. If a human gets sprayed by the goo it will begin to evenly coat the hosts body, merging with them and assimilating them into another formidron drone. While the person is being assimilated by the goo, the hive mind invades their mind, speaking to them and trying to take over their mind.