It's one of the cases where scripts are the simple solution.
From my own experience, getting NPC to follow the player using events is a hassle. You can set it to 'move player left', 'move EV006:NPC left', etc, etc, or use the Approach, which makes NPCs run around like they're on Extasy.
Or, you can use a caterpillar script. I use Zeriab's, which can be turned ON and OFF by pulling a switch.
Simply make an event in the map of the cutscene, for the 2nd party member. Name it \cat_actor, where i is the id of the 2nd actor. That way only he follows you. Change his sprite(Change actor graphic) to whatever you need, until the cutscene is over.
Then, it's a simple process: turn the switch ON, make the cutscene, and turn the switch off.
It may seem like an overkill, but it's only: turn caterpillar ON, do the cutcene, turn switch OFF. If you do this, don't use my ADD-ON for the script.