Interaction between the barrier and companions was not defined in the rulebook.
Any thoughts? Allowing movement would give players incentive to save their companion to deal with barrier near end of the game (at the detriment of less flexibility during the game).
Short answer: yes!
It was implicitly defined in the phrase from the rules:
"The Companion follows the same rules as the Merchant"
Since the barrier is not one of the exceptions listed, it definitely applies to the Companion!