Rie has Rejection Sensitive Dysphoria, and is overly sensitive to perceived rejection. Like Shiina getting a plushie when she doesn't. Or when Jelly got that huge dono when she doesn't. Or a bunch of other examples we could all list. I'll make fun of Rie like everyone else, but I won't be too hard on her over it. Even if she vents on the alt account, she still supports everyone to her upmost on main, including helping with and organizing group projects and events, far beyond what she's obligated to do as a Phase Connect talent.