Star Adam Driver explains to EW: “It’s another good example of [writers J.J. Abrams and Chris Terrio] kind of leading what’s going on externally with the character with what is going on internally. That’s not a new detail — it’s been happening since The Force Awakens for that character. Even the first time we talked about putting on his suit, the suit was appropriately uncomfortable and that seemed like a really fun thing to play with — maybe he’s literally uncomfortable in his own skin. It’s restrictive in a way. And then he kind of goes through a rebirth over the second movie and starts to shed that a little bit and become who he is. He’s a very unformed person, which is exciting to play and to have that be represented physically in a costume piece, or a lighting choice or, in this case, a helmet. It’s a coming together, he’s cherry-picked things he’s looked at through his history and that he’s decided he wants to claim for who he is. So it’s a physical representation of how that character has grown.”