Ruka Suirenji: national super idol. With even a concert in Las Vegas under her belt, she seems unstoppable, but something that could stop her has just reared its head! When you're a professional idol, it's unthinkable to have even one thing you can't do. Episode 7 reminds us that unseen efforts are the secret to victory and success. Still, while she may be an idol, she's still a girl, and sometimes she gets lonely too.