Crimson is the co-protagonist of the story, characterized by a haughty and cautious behavior, has a deep hatred towards dragons despite belonging to the same species and being the king of the winged family of dragons. In an alternate time it almost succeeds in eradicating the dragon species along with Ragna 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.

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