"Don't get lost!" That's important. As well as "come back here after a while."

Richard actually wants to stay and find out what it will do. Wants to see if it can be fought.

But that won't answer the question of Nariko, so he starts running, too, keeping an eye, as long as possible, on the other three... and how the thing moves. Which of them it follows.

Will he or she need help very shortly, too. Just in case.