Why lili didn't appear in the castle arc

Before the castle arc, lili was in the castle with SooWon, But she disappeared completely after yona came to the castle. She appeared while the people was welcoming yona and appeared in the competition between tribes leaders and warrior dragons, but then disappeared and reappeared in the city during the Kai War. Does anyone remember where you went? Or this was not mentioned in manga. If not why did she disappear?