Red Dust's arrival both surprised and delighted Happy and his party. They were shocked to learn that the expedition group from Chivalry Sect had perished because of Situ Luoyu's scheme, and only Red Dust got to survive out of sheer luck after he managed to hide in Dead She-wolf's chamber. The second part of the story left them happy because Red Dust was at Mystical Realm. He only needed to rest for a while before he could be of great help.
Red Dust told the four of them that since he had been avoiding the elites from the two sects to not be killed, he did not even have the time to treat his wounds and circulate his qi. He had, in fact, been prepared to die in Dead She-wolf's chamber, but to his surprise, he did not attract Dead She-wolf's attention, which was why he had been waiting by the edge of the chamber until then.