A leash animation when someone is following you :)
I mean, they WANT to be your thing, and YOU make all the work. Like dogs. Sooo, I see a leash iridescent, and the follower has a special emote face as a happy dog. I would really love it.
I don't like the description, or comparing the follower to a dog. However, I would like to be able to easily tell if someone is still following me without having to click on their name, so I wouldn't mind seeing a line or the like going from the leader to the follower, sort of like the sharding lightning.