I can't wait for the fight, I bet they would be surprise about him not using a sword just like his father. A fighting style not inherited from his parents, but a style with his own uniqueness and hard work.
Not noticing things has nothing to do with your eyes. It's inattentional blindness, which has a very famous example in the "Invisible Gorilla"-experiment.
With that flashback I just know she's gonna be one of/the first one to find out about Treynar, and I just know it's gonna be sad when she has to come to terms with Eirth working with him. :<
So the Demon Lord is a bigger hero than is let on? Annihilation magic is no scoffing matter. There's always a lashback. You may fire it, but what is the cost? A nation? A bunch of innocents? Your own soul?
The Demon Lord was right to kill him, and the rest of the town. He didn't want his past mistakes to repeat themselves.