Complex sentence: Mashiro's true body is revealed in episode 25, encased in a crystal star, she is also further revealed to be the winner of the previous HiME carnival as well as the former user of Kagutsuchi, Mai's Child.
Split into simpler sentences: Mashiro's true body is revealed in episode 25, encased in a crystal star. She is also further revealed to be the winner of the previous HiME carnival as well as the former user of Kagutsuchi, Mai's Child.