It is so fascinating to me that she keeps refusing to admit she was the woman in the mask at the theater. It's because the masks allowed her (and him too, of course) the anonymity of expressing her deepest self and be unfettered and she is terrified of admitting that to him or anyone because she likes him and she wants to help, but she does not want to be emotionally vulnerable and enmeshed - her life n1 has made her desperate to avoid any uncontrolled emotional entanglement - in this life all her friendships and bonds are very much on her terms and under her control; but he's already escaping those confines and if she admits them, it will remove even more veils between them.
The thing with the hair - the way she remembers Life 1 Song Mo, with his hair entirely grey and now she's noticing a few strands here. AAAAA! (But also, she doesn't even process what a huge act of intimacy it is - to touch someone's hair this way.)
Because she's also quite damaged, just in a very outwardly functional way.
