i do feel for haneul, i really do. because going back i don't think his attempts of building a connection with Chaeha were entirely because he was told to.
He seems very lonley and very trapped in this life and when Chaeha first joins the Team he is the one who tells him how to act around Taeseon so he won't get on his bad side. He says Taeseon is not actually that mean, he says he's nice to his staff, Haneul is the one to suggest they take Chaeha out to welcome him, he asks repeatedley where they are, why they leave him out of the loop and looks genuinley hurt whenever he realizes the two want to get rid of him or went out without him. Which makes me think that Haneul had tried before to build a sort of friendship with Taeseon and now takes his chance with Chaeha again. (Jokes on him though cause with him Taeseon is actually dead set on keeping things professional.)
Could it all have been to get better intel and spy on them for his dad? Maybe but the way Haneul talks about his parents on that roof and reacts to his father, i don't think he was actually that interested in doing his dirty work. He was just like Taeseon and Chaeha, a lot more guilty, a lot more murderous, but he was right there with them in the trauma club and maybe was just trying to connect with people he believed could help him.












