She may not feel she's good at comfort, and honestly, the suckerpunch to the gut Cassian experiences at the feeling of her fingers between his own isn't exactly comforting, per se - if anything, it is likely the death knell of there being any chance of him being sober come tomorrow - but it does steady him.

Whatever the hell happens, even if Jyn hates him once she does remember, this is not...terrible. She's here.

So he squeezes, a little, before lifting his other hand from the chair and brushing his fingertips against her forehead.

Sentimental. Perhaps.