This is a simple plugin, used for custom prefixes, set by players.
You can give this as a perk for donators, or as a reward for staff, or whatever your heart desires.
Because a lot of other plugins like this do NOT work for GroupManager, I have created a new one, that does work for GroupManager.
Install EssentialsGroupManager (search it up)
Place in plugins folder
/setprefix <prefix> [username]
Thanks to all the people who worked on GroupManager
Please leave feedback on the plugin!