(Spoiler) A small question regarding the factory scene in "Possible Love" featuring Jeon Do-yeon

The scene where the labor union is established at the factory Jeon Do-yeon attends feels like a bit of black comedy and an ironic moment.
Since the CEO cannot legally say no,
in a company with three regular employees,
when he says he will allow it if they gather four employees,
the female employee working in the back office says she wants to join too.
The CEO looks flustered, asking, "Why would you do that?"
It seems like that female employee might be the CEO's daughter; am I right?
I don't remember any specific scene mentioning it,
but judging by the atmosphere, even though she is registered as an employee,
it seems like neither the CEO nor the other employees count her as one,
so she felt like part of the CEO's family.
Anyway, that scene of establishing the factory union is quite memorable.