In RPG Maker, the "event touch" trigger allows you to create events that will execute when they touch the player.
"Touch" means when they try to move in a certain direction, but are unable to move because there is something blocking the way. In this case, the only object they check for is the player.
If one of the player's followers is in the way, they will not be able to move, but they won't run their commands either.
With this plugin, you can have events triggered when they touch either the player or the player's followers.
More information and downloads available at HimeWorks