I have seen 10 of them stacked on top of each other doing the blm job quest, lower paths near camp tranquil, it freaky because they raise up out of the ground spam moves on 10 mobs that spawn at the same time and then all 10 lower into the ground and interact with something and vanish again.

Only got the name of one because they are so neatly stacked they are literally all sitting in each others character space.