But wasn’t Leona unconscious at that point? So she probably doesn’t know. And even if she wasn’t, it’s not like the participants can actually watch the show. I could be wrong, though, I don’t really remember when Jack called us that.
MC does know that Bo Lo called him that through the whole of chapters 5 and 6, but they wonder if Leona even listens when he speaks. Plus Leona doesn't let us explain. Though I seriously don't know if she was being serious when she said the "do you consider Laborers people?" She most likely meant it, but she is too close with Kosuke and is not like Bo or Jack that have to remind every Laborer in the vicinity that they are indeed a Laborer.
I take it that only Angelo was strong enough to not pass out temporarily from Jack's attack because no else knows with the exception of Fang considering she was in Thunderfall during the past year and she does refer to you as former laborer in the Storm Gate.
Desdemona know if you tell her yourself on her quest and she takes it as funny to mess with her disciples considering that she herself is the daughter of a laborer too.
Guiren I believe it is never said but I doubt he would care much about, no more tham he cares about Kitsunes at least.
Fang doesn't really care considering her own clan was founded by her mother.
Kosuke is a Laborer themselves and childhood friend.
For Secondary ROs,
Keiko knows as she has stated, but for those that are useful she doesn't really care. She does obviously have the Noble superiority complex.
Jack, there is nothing to say.
Goro, I haven't romanced him yet so I am in a blank here.
Mina, it hasn't been stated but I doubt she would care.
Eldra, obviously doesn't care as time has teached her that caste don't matter.
And I think that I am not missing anyone because the other characters look more like a you can hook up with them more than them being ROs.