Interesting

'I knew it...this woman is going to get in the way of the tests...' The guide thought as he looked at Isobel with a furtive glance.

Of course, this is what the guide was worried about. It was not only because the guide thought that Isobel was another woman of Falkor but also because Isobel might get in the way of the tests.

If Falkor was the only person to come in this place, together with Lara, it would have been fine.

After all, Lara wouldn't have to do anything if she doesn't know anything., and Falkor would be the only one to take the tests...unknowingly.

However, since there is another person present in this place, which is Isobel, she has become an unknown factor that can interrupt things and disturb the flow of the event.

Of course, the guide certainly didn't appreciate this unknown factor since it would definitely kill the purpose of even testing Falkor.