Yuvan was still the reason Arthur entered the tower. Julius was a good man, but more than that, he was Julia's only remaining family. Arthur saw how broken she was and how much she cared about him despite it.
The fundamental change in Runera, including the earlier events with Mistletoe, originated from Yuvan and this Red Tower. Arthur wanted to get to the bottom of it and understand their motives since they created the cult Strings of Fate.
As the clouds rained and filled with black lightning, Arthur wondered if he had spent too much time inside the tower. Julia was bound to wake up in a few days or when she overcame her trauma. Arthur wanted to be there. In the Holy Crown Trial, time did not move. Arthur wondered if this was the same.
"Tell me, Whisker," asked Arthur as he gazed at the clouds. "Does time inside the tower flow the same as the outside? Would a day here equal a day outside the tower?"