@Eclat123
Rather than being nonchalant, and not bothering to, she was pretty much restrained by the first prince. She had no friends, and any attempts by other people such as Liz to befriend her got shut down immediately. It's likely that she didn't even know where MC was and the prince didn't give a shit either so if the girl asked, he likely wouldn't know and wouldn't let them meet. Plus he couldn't be bothered to find the MC who he belittled and called her a fraud.
And even if you've read the novel and know more, you still don't know where she is a green tea bitch yet, do you? You did say that you don't believe that she isn't one yet after all. Perhaps she could be, in the future, but at the moment it seems she's just over dependent on others.