User blog comment:SayuriDarling/The House of Hades Official Discussion/@comment-5277710-20131013165500

O.K the one thing i keep seeing on this blog is about Nico and his sex status. My opinion personally? i dunno if its true or not, i'm not against it or anything, but Nico viewed percy as cool heroic wanted to be like that or be with him since Bianca left him, kinda only left him with a few role models seeing how is Dad was not impressed with him at that point. I dont think its true, i think it is a  phase that will grow out, he did blush and was shy with a few girls that doesnt just mean he was uncomfortable he could have been a little attracted to the two. And also the line "An oath to keep with a final breath"

Yes Leo made the oath but it doesnt state that he would be the one dying or if the person will actually die. It could be their last breath as a mortal being or it could be Nico who might end up doing it, you never know and we have to wait an entire year to see the answers.