Out of the local iterator group, he is the most dangerous and unpredictable of them all. Pebbles doesn't care about anything other than his goals, going as far as killing another Iterator just so he could use more water to create his experiments. He is also shown to be very impatient as he will kill the player if they stay too long in his chamber. He is very egocentric, calling himself "godlike" in comparison to the other creatures of the planet, most of which he considers as "pests".