Youkai are ... defined by our concept. We come into being because of it. It's the truth behind us, and our purpose of being. So, there's always a concern. If you cease to have a purpose as a spirit, or if your purpose goes away, maybe you just... fade.

[She made a little 'poof' motion with one hand.]

I've always wondered if I would still exist if I wasn't jealous, but I don't know that it works lie that here.