Board Thread:The Heroes of Olympus/@comment-38956316-20190328212022/@comment-31802321-20191218165936

That's a very difficult question. In terms of character development Nico's is the most wholesome arc across all three series. I really like his character for that, for growing up in front of our eyes yet never being the main character. As for Leo, well, the character is a charming one by itself. But his arc is underdeveloped as compared to Nico. I really do like Leo but going with Nico here.