Yeah, everything as expected. She's an insecure self-absorbed mess that can't stand on her own, and now that other people are moving on with their careers, their lives, have plans about their future - now she's desperately trying to stop Yusuke from doing that too. Pathetic. And she herself said she wasn't planning on going pro, she isn't developing her skills and knowledge... She just likes the attention you get from being in a band. Ugh.
Well, luckily, Yusuke is starting to free from her grasp little by little