The leader has a cloud that he uses to transmit all of the messages he needs to send to his people. The cloud floats above him and when he wants to tell people something he just whispers into the cloud and it transmits his message really, really loudly to all of them.
As the leader transmits his latest series of messages to you and the others, you notice a pretty large dent (でん) in it. That dent is probably a clue to what this cloud is really made of.
Currently there are no similar looking kanji which exist in the WaniKani learning system