First Encounter

While walking through the cave and getting familiar with his surroundings. Jacob trying to probe with his mentality.

He never felt the feeling of sensing and abnormality with his mentality. 

It required a lot more training to careful Identity what could be behind close cover. With careful cultivation, it would be easier, however, Jacob had not reached that stage.

Truthfully speaking, he was slightly scared. The pressure from the 'Book of Mentality' would be a nightmare.

He would continue in the future, however, not too soon.

For the time being his plan was to figure he was on his own.

Lisanne saw Jacob talking to himself and was creeped out, 'What is this creep thinking.' She was scared for her safety sometimes. Thinking Jacob might have got the wrong impression of her choice to follow him she spoke up.