
Well, in the novel that Cale reads, Choi Han is supposed to encounter Rosalyn and Lock during his journey and save them, but then because Cale exists and Choi Han is following Cale because he still owes him one, Cale had to personally order Choi Han to go through the journey that Choi Han is supposed to go to so that Cale doesn't alter too much of the plot

Right! Cale wasn't supposed to meet up with them till much later in the Capital. Lock wasn't supposed to go thru his first berserker transformation yet. And all the kids in the village were supposed to be killed by the bandits. But things changed. Cale had a room for Choi Han at the inn. But Choi Han brought the kids back and put them up there so he had nowhere to stay. Seeing as he was to meet up with Cale anyway, he just came earlier with Lock and Rosalyn for help and safety.
Why did cale invited Rosalyn and Lock? I forgot-