Everything happens for a reason
Really?! The only thing we learn from the last chapter was.... Well nothing!! And the only things we learned related to her this chapter was that she gots some 'single child' trauma and that the informant was a regular at the bar. We basically learned nothing and there was no reason for this entire servant-for-a-day arc except for the author trying to normalize that psychotic bitch. So I'm trying my hardest to find a legit reason....
Forgot to add but
There's character development, and then there's.... Well.... Her.
We learnt that one of the customers in the bar may have an unhealthy obsession with Jihyun and is the one divulging his secrets. I feel like that’s crucial to the plot somehow and there’s a reason the author has worked that in. Just a hunch... And yes, being a single child of puritanical parents would warp anyone and explains why she is psychotic enough to make Yohan her slave-for-a-day plus all her other bullshit. I don’t think it’s supposed to make the reader empathise with her. It just helps somewhat answer the question every time anyone has screamed, “what the fuck is that bitch’s problem?!”
Yohan, I told you it was such a waste to deal with that girl. All the thing you do is just nothing at the end. Her infor is nothing but trash lol