At the end of Episode 19, we learned that Cal is not dead (to no surprise). Apparently she escaped death by going to the video store. Reiji (Zwei) thought she died in the blast and never came back to the apartment. Poor Cal was sitting there crying as she wait for Reiji to come back. He never did. Instead, our old buddy, Scythe Master comes through the door way. I shook my head knowing of what to come.
Reij and Elen (Ein) ran away together, bouncing around country to country for 2 years and finally settling in a small town in Japan. Both attended a local high school as sister and brother. It seems that they finally got their wish of finally living a life of normalcy. However they are rudely awakened from their dream by a familiar face.