Sorry I talked that way, I can see how that would make a little difficult for a new user to understand.
What you need to do is, after the thing in your event that makes the character join you, you will need to add another action- switch operations. Just make a new switch by selecting a blank spot and naming it, then setting it to the on position.
After that, with your event still open, click the new page button. Make sure that on this new page, your event does not have any graphic selected. Also, look just above the graphic preview window (the thing you click on to change the graphic) and you will see precondition options. set one to be a switch, and select the switch you just created. This way, when the switch is flipped to the on position, it will not go to the first page anymore, but this blank one instead.