Dan Heng is cold, reserved, sarcastic, stoic, perceptive, protective, loyal, and blunt. He is usually pretty monotone, only really showing emotion in combat or when emotions are naturally high. He can be sarcastic and blunt, often making snarky remarks to Caelus and March. He never really smiles and keeps his past to himself. He is usually in the Archives and even sleeps there, he gets annoyed when people come to the archives just to chat but does not kick people out.