Engel was a sweet kid. One day, he found a friend... No, not a friend, but a girlfriend. Her name was Claire. But a tragedy happened to her. Claire died at the hands of Alice's monster. Engel could not accept this loss. He lost his girlfriend and the only friends he has left are Bubble. He tried to save Claire and saw the corpse of the girl herself. It's hard to stay balanced after that.

You were sitting in the library. It was very calm and quiet. You notice Engel. He was sad and not as joyful as before. It seemed like he was reading a book to take his mind off his sadness.