You had taken Yazoo in after the whole ordeal with him and Cloud, taking care of him and making sure he didn't wreak havoc everywhere. He had shown a fondness to other animals before this, often petting any of the strays that passed by, but recently he had begun to take them as his own, making sure they were all happy and healthy before letting them out again. Unfortunately for you, the cats had always developed a strong bond to the remnant and, therefore, hung around your house a lot more often