UrsusArctos: If you look closely, you'll see the number 2 on the Magi. Naoko's maternal side would understandably have been the most horrified at her own actions, and true enough, she committed suicide on top of Balthasar, the Magi containing the maternal part of her personality. Interestingly, the original script had her die on top of Caspar, representing the womanly part of her personality and implicitly the side responsible for the murder in the first place.
