Like people, dragons do not have a natural enemy or predator. The only thing they might fear is each other. To Solarius, his wisdom and age makes the feeling of fear obsolete, Cerul, Lazuli, etc… Are too pridefull or “bull headed” to feel fear, but some dragons know there place among Solarius and humankind’s surprising ingenuity to dare not defy them. Xaxith is a coward despite her power, she knows that Solarius can make his will be done, but he doesn’t seem to take action.

Psychological events can trigger fear, but as a species there is no common thing that they are terrirfied of.