Crimson is the co-protagonist of the story, characterized by a haughty and cautious behavior, he has a deep hatred towards dragons despite belonging to the same species and being the previous king of the winged family of dragons. In an alternate time they(Ragna and Crimson) almost succeed in eradicating the dragon species but for reasons not revealed it could not be carried out. Currently Crimson and Ragna maintain their fight against dragons through a past temporal plane.