There is an actual reason why he wears a blindfold, and it's certainly not a fashion choice. He wears it for the comfort of himself and for others. All she needs to do is ask for the reason and the answer shall be given.

"Sounds like you speak from experience. I know it's hard for me to tell because I can't see people. Not at all. I am completely blind."

With an empathetic nod, quietly, "It happened to me. I know from experience. I had an acquaintance who did that to me in our past life back in our homeworld, and he's on this train now. I'm not sure if he's being truthful to others now or behave for the sake of appearance."