Complex sentence: A fragment of his will is lodged in Luna Inverse, the sister of Lina, and she is known as the Ceiphied Knight, which mentioned while Lina and her group are at the Fire Dragon Temple for the first time.
Split into simpler sentences: A fragment of his will is lodged in Luna Inverse, the sister of Lina, and she is known as the Ceiphied Knight. This is mentioned while Lina and her group are at the Fire Dragon Temple for the first time.