I have to admit, Yan Jing's ability to read people was quite accurate.
Ningning's flaw was her haughtiness, Yun Jin's was her dominance, and Ruoxi clearly struggled with social anxiety and lack of confidence. Following Yan Yu's training orders was one thing, but for Ruoxi to take the initiative to pursue Yan Yu was an even greater challenge – akin to asking her to sit the college entrance exam.
After all, one could retake the entrance exam if they failed, but if chasing after the captain failed, it might feel like the end of life.
In fact, the reason Xie Ruoxi still harbored an unrealistic hope, instead of completely giving up, was because she remembered the time she'd summoned her courage and rushed into the captain's bedroom (before the formal joint cultivation began) and spoke a stream of incoherent, affectionate words; yet the captain had not immediately kicked her out.