6 and 7 are among the best the series has. I'd only put 3 above them but they're far above 1 and 2. The last episodes in 6 are amazing (also 6-6 is the best episode in the show) and 7 has some of the best tension in the series (hell, the only reason Ironwood is even good is because of that tension. So if he's good so are RWBY+, the Ace Ops, Watts&co, and the Happy Huntresses)
And while 8 is easily the worst season in the series yet it does still have more good than that (the Emerald, Cinder, and Nora stuff).
Also, Shenhe is cannonically bound by ropes that dampens her emotion so she won"t kill people with her homicidal urges, and Yelan enjoy pain. So you got a masochistic who like to bind people, and a bound sadist.
Isn't there a voice line about Lisa, Jean, and Eula doing something in Jean's office? And Kaeya makes sure no one knows about it?
Not sure it's a voiceline, but there's something in Eula's character profile about her storming into Jean's office as if she has a score to settle and it ending up just being a tea break, to which Lisa is usually indignant about not being notified.
Is that the one?
It's always funny when as soon as anything RWBY shows up here, the Hatedom has this compulsatory need to type out how their opinions are supposedly facts. They know nothing about writing or animation, but boy do they have opinions about it :D
Maybe let a person watch it if they want and form their own opinions instead of trying to herd them into your flock.