Dragon Slaying Hero from Scratch

Hey! Man, I gave you a hexagram of "Medieval Dragon Slaying Fate". You were born to be born between the dragon's breath and the sword's edge! Grab your gullam sword and set off! (Please ignore the above) My name is Ethan If one day your mother quietly tells you that your father is the devil in disguise... Oh, then you're screwed The first rule of being a hero is: you better not be the Chosen One. But... (My fate is up to me!...) Destiny has fought with itself, and it has lost. Wolf, pig, two-headed snake, unicorn, mermaid... Then to angels, devils, dragons... This world is really wonderful, but we should leave such complicated matters to those knights... What? ! Do I have to go? That's bad Hold my little waistcoat tight, Uton weorþan! (This is some "unofficial history", and some plots may deviate from the real history. Please enlighten me from all warriors)