gpt
Subaru:  The White Whale. Subaru knew he’d heard the name during the first time around. The name of the monster shrouded in mist that had shut off the highway. With the highway blocked due to this creature, he’d had to take a huge detour to get back to the mansion. One might say it was the reason he didn’t get back before the Witch Cult’s onslaught. But until that moment, Subaru had never laid eyes upon the monster itself. Furthermore, Subaru had forgotten its existence; he couldn’t deny that he’d been too naive.
human
Subaru:  "How could it come out like this, right now?!" Subaru knew that the highway was closed whenever the White Whale appeared. The first time around, the blockade had occurred on the third day of Subaru and Rem’s journey back due to the appearance of the White Whale’s mist along the road. And that moment was the night of the second day—no doubt the royal capital would be informed of the appearance of the mist in the morning, with the highway sealed during that day. That night was the only one when they were unaware of the White Whale’s presence, and they had blundered into the menace.
gpt
Otto:  "To think…running into the Wh-White Whale… O Dragon, O Dragon, please deliver us…!" With hollow eyes, Otto murmured a prayer to the Dragon in search of salvation. As Otto lost the will to fight and even his very spirit, Subaru saw with his own eyes how, among traveling merchants, the existence of the White Whale was synonymous with absolute terror.