I hate the "I was born as a monster, but that doesn't matter shortly into the story" trope. Least in Tensura he's still recognized as a monster most of the time. I mean seriously, what's the point of him being a demon if it has no bearing after the first chapter.
Isn't kinda weird for people to be so hostile to him just for being near her? Especially the guards, going straight to attack mode without reason is insane.