After the subject about Lescar and how Yoelona was responsible for his friend's disappearance, Luke skipped the part about his long journey and how he picked up a Legendary Skill, going straight to the part about meeting his gang.
"When I found Meredith, it was such a relief that I thought I was in a dream... But that night, when Yoelona told me the reasons for her coming to Oukiwa, I knew things wouldn't be so simple."
It was a coincidence of fate that Yoelona had removed Luke's friends from Oukiwa just a few weeks before the First Servant threatened their lives.
This also served to prove to everyone that the First Servant didn't know everything that happened in the world, as they had impressions at first. At that time, the great demon not only knew Luke's identity before the half-wolf even met him, but he pushed him into an accord and soon after broke it to become the half-wolf's sworn enemy.