Edelgard is one of my favorites character in FE3H. This is my romance memories with Edelgard Von Hresvelg.
I believed the theme song “The Edge of Dawn ” actually represent Edelgard Von Hresvelg view. Japanese theme song name is called “ Lady of Hresvelg.
Hresvelg is family name of Edelgard, which in Norse mythology, Hræsvelgr (Old Norse "Corpse Swallower") is a giant who takes the form of an Eagle.
Warning! Spoiler Alert for below descriptions. This is my personal view on the lyrics.
[ Yet still I hide Behind this mask that I have become,
My blackened heart Scorched by Flame , A force I can't run from ]
Edelgard not able to run away from fate become Flame Emperor to accomplish her goal. Fate refers to all her siblings die only Edelgard bear the Crest of Flame.
[ Memories that made ; Those day sublime
These ruined hall entomb ;Stolen time ]
Edelgard trapped in dark underground for blood reconstruction surgery and she will have short life expectancy due to holding 2 crest.( Edelgard and Lysithea Support Conversation)
In Last part of lyrics/videos,
[ I fear the edge of dawn, Knowing time betrays ]
Time is ticking. Edelgard understand she had to complete the goal to free Fodlan from nobility system based on crest, she also want to spend time with love ones (Byleth)