Complex sentence: They escape to the Kingdom of En, where Youko learns that she is the heir to the throne of the kingdom of Kei, and although she is initially reluctant, she accepts the position through her growth in the story.
Split into simpler sentences: They escape to the Kingdom of En where Youko learns that she is the heir to the throne of the kingdom of Kei. Although she is initially reluctant, Youko accepts the position through her growth in the story.