I feel the need to establish at the very least that Breq will be coming to more of Jeff's open mic night performances if he ends up continuing them with any regularity, and probably talking to him at those too

I don't know if they'd end up opening up to each other much since she's as much of a clam about her past as he is from your description, but she's a big music enthusiast even though she's not a performer, and she'll love prodding him for songs