Just You Two

The others reacted the moment Grey attacked the middle-aged lady, drawing closer to him. 

Even though they were close to her, they were unable to sense Grey's appearance. Of the other four, there was another Space Elementalist, but compared to the first Space Elementalist Grey was fighting with, he was still lacking. There was no way he would be able to sense Grey's movements in the void. Grey, on the other hand, can keep track of his movements. 

The others got close and attacked Grey, with the hope of forcing him to leave the lady alone.

Grey couldn't be bothered with their attacks, only the attack of the Water Elementalist could threaten him, and when the attack got close to him, it phased right through him hitting the ground. 

His armor and physical body could take the current attacks these people were sending at him. None of them had an attack power as strong as him, so there was almost no need to bother about them.