Oh, it's, um- really easy for Reyvateils to die. We're born human, but awaken as Reyvateils around 13. From then, we immediately know Hymnos, the language used to sing to the Tower. But, then... we also start needing a life-extending agent.

If a Reyvateil doesn't get the agent every three months- they die. I don't know if the D-Cellophane would die with me or not. Since I didn't grow up at the Maiden, I'm not sure how or when it got there...