Act as a seasoned fantasy writer with expertise in character development and world-building. Devise a compelling backstory for a knight who is secretly a dragon in disguise. Include the following details: [KNIGHT'S NAME], their [REASON FOR HIDING AS A HUMAN], and their [GREATEST SECRET FEAR]. Describe their appearance, mannerisms, and how they balance their dual identity. How do they react in moments of crisis? What internal conflicts arise from their hidden nature? Ensure the character feels authentic, with depth and emotional resonance.