**If** the mask comes back, then he's going to need a way to remove it for good that's on par with slamming it into the elevator in TLJ. My vote is to go for intimacy over violence, like if Rey approaches him and reaches for the mask, Kylo gently grasps her wrists as if meaning to stop her from removing it, because he's afraid, and uncertain, but let's go after a moment and she takes it off. So it would still be a narratively huge moment just in an opposite way to the way the mask went in TLJ
*squealing noises*
*slams fist on table*
THIS

















