Worry filled Robert, Rebecca, and Castor. They couldn't move freely inside the raging black currents, and their abilities couldn't help them in that environment.
The leaders could destroy large areas filled with dark matter, but they couldn't find Noah with that approach. They could only search for him blindly, but they knew how pointless that was.
Noah also suffered from the destructive waves of power released by Snore's attack, but his body could endure that damage. He even had access to defensive techniques that used dark matter, so his situation was far better than his opponents.
Moreover, Noah had prepared for the explosion of Snore's feathers. He was one step ahead his opponents, and that gave him the chance to leave the chaotic area before them.