Chishio roamed the Forest of Menos, lookin for this group of renagade arrancar known as Korosu. Because Chishio was leader of the Espada, he led Las Noches, so he knew tis group wasnt hiding in his castle. He also came to the conclusion that they would be hiding somewhere within Hueco Mundo. He didnt have any luck finding a base or anything on the surface in the desert so he searched below in the Forest of Menos. Hollows were afraid to approach him because they sensed his power, so he was free to roam about, without distraction. His hands were in his pockets as usual and his zanpaktou was strapped to his side.