Rollbacks are trusted editors who have the extra ability to quickly rollback bad edits. You can apply to be a rollback (for 60 days at a time) if you meet these qualifications:
You have at least 200 edits
You are active almost daily for the past two weeks
You make constructive edits
You have done some maintenance help in the past (like undoing bad edits)
If you meet them, contact a bureaucrat and they will look into giving you the permissions. If your rollback permissions expired, you can re-request them.
Wiki Representatives are Fandom staff who can manage the wiki. They have all permissions on the wiki, more than Admins and Bureaucrats. They are here to help keep everything in line. They can also enable extra extensions and manage more MediaWiki configuration. They mainly provide support for issues or questions related to the wiki, including CSS, extensions, templates, moderation, applying best practices, and sending bug reports. You can find out more about them on the help page.
Bots are automated accounts that can fix grammar and do other bulk tasks. These are the only bots which are allowed on the wiki. Their edits are automatically hidden from recent changes as to not clog up the feed.