Alex walked through the aura-less path, letting Whisker handle as much as he could. He was noticed by a couple of people during the times, and while some thought to come and approach him, Alex's cultivation base made them reconsider.
They had learned how strong he was before he had even entered the Saint realm, so trying to fight or challenge him right now was simply idiocy.
After a few days of walking, Alex arrived at the location of the spatial rift where the aura of space was the most potent.
After arriving, Alex waited on the outskirt where he could barely feel the aura, and started cultivating. He was waiting for Whisker to be done, so he had to remain out here.
However, Pearl had no such restriction at all, so Alex sent him inside to feel the stronger spatial aura. He warned Pearl not to go too far in, but other than that he could do whatever he wanted to.