Nero was bored. He had just returned to Karakura after ten years and had just spent a few hours finding a place to stay and now he was on his way to Urahara's store. He felt he needed to check in witht he eccentric shopkeeper... he didn't want to because the guy irritated the hell out of him. But the man had helped him when he first arrived in the World of the Living and felt he had some responsibility to the man to keep him informed of what was going on.

As he made his way down the road he heard the unmistakable soud of a Hollow roaring nearby and sighed in annoyance. All he ever saw in this world were the weakest of the weak. The Hollows that would never be able to survive the harsh and brutal world that was Hueco Mundo. He did what he could do to protect the living when the Shinigami could not. Since getting out of his gigai was dangerous for the weak souls around him Urahara had devised a way to keep hidden from the mundane Living. A watch on his wrist would make him invisible to the spiritually unaware and he could then draw out his blade from his soul and slay the hollow just like a SHinigami would.

Entering an alley he disappeared in a burst of Sonido after activating the watch, quickly killed the Hollow and walked away.