They are each other’s sword carriers, their secret keepers.  Betty is the only one who knows about what happened in that dark alleyway with Kate’s dad; Kate is the only one who knows what happened with Betty in front of that piano.  Betty’s feelings for Kate bring her sexuality to the surface, her relationship with Kate leads her to the place where she accepts them.  Kate’s friendship with Betty keeps Kate safe in a new life, and allows her to live in love rather than fear.   Both of them feel there is something wrong with them, and both of them provide a balm for that pain, even as they’re exposing the wound.

- Connection, Dichotomy, and Parallel Truths: Betty and Kate of Bomb Girls