User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-24.140.54.85-20121007012833/@comment-101.112.119.227-20121007095554

The bit with Nico dying would also mean that one of the girls would have to die too, because in the Mark of Athena it clearly states that there must be both a male and female hero's blood spilt in order to wake the Earth Goddess Gaea.