Therius saw there was no use to hide the truth and better to just get it over with. So, he slowly recounted the events, from the moment Emma was detained by the king's guard until Arreya's death.
As Therius talked, Emma listened with tears streaming down her face non-stop. It was a heartbreaking sight, seeing Emma again experiencing the suffering when she lost the people she loved. Xion felt his chest tighten and he had difficulty breathing.
He had never felt this sad for anyone else before. Unfortunately, there was nothing he could do. As he said before, not even a Time Master could go back to the past to change the future.
Even though he really wanted to prevent Arreya's death, there was nothing he could do. This really made him feel useless.