The choice to make Marth’s Ancestor Anri Zero Emblem was an interesting choice. Anri represents a hero that Sombron described, a man who could do everything alone. This contrasts with his descendant, Marth; whose humility and sense of camaraderie defines who he is.

Now it makes sense why Sombron admired Zero Emblem/Anri, he valued the power to do everything alone. Alas, eventually we see how Sombron would become the monster he is. So in a twist of irony, Sombron became like the person Anri swore to defeat: Medeus.

Marth not being like Anri is meant to be the point of Marth. Marth’s character is about accepting he can’t do everything on his own. And with valued friends and allies, Marth is able to the Hero King people like Lucina look up to.

Thus, this ties in with Alear and how his character is meant to take after Marth’s character. Alear is able to become the Divine Dragon people glaze them being. The reason being that Alear takes on the traits that made the Hero King who he is in eyes of all who knew him.