Mothman (momster)

If he existed:

Silent observer: He would be extremely attentive, almost always in the background, observing human behavior and nature. He wouldn't be naturally aggressive, but his penetrating gaze would suggest that he "knows more than he lets on."
Uncanny intelligence: He would likely have a keen intelligence, perhaps even a form of extrasensory perception—if he could predict disasters, he would need to interpret subtle cues from the environment, the weather, and even human emotions.
Reserved and evasive: He would likely avoid direct contact, appearing in isolated or dark places to avoid being hunted or misunderstood. If he did approach, it would be strategic, more curious or preemptive than malicious.
Unconscious Protector: Even though its appearance is terrifying, its intention was not to harm. Perhaps it warned or "foretold" dangers, acting as a sort of involuntary guardian, even if humanity never understood its actions.
Mysterious and enigmatic: There would be an air of melancholy or disconnection, as if he were between worlds—partly connected to the human, partly to the natural or the unknown. He would likely have little interest in social interactions, valuing the freedom to fly and observe.