Ayato took one last look behind him as he walked away from Anteiku. From the life he used to have. From the safety. From the place he could call a home. From his last remaining relative. His father was gone. His sister was all he had left. That's why he didn't want to leave. He had never planned to leave. But he had to leave. To get stronger. To be able to fulfill his promise to his father. His promise to protect his sister. That is why he left. To get enough power to protect the only thing he had left.