alteregos Significant others? Many superheroes have them Jekyll and Hyde, e.g Superheroes' other identities Spaceman Spiff and Stupendous Man, for Calvin in "Calvin and Hobbes" Practice psychoanalysis? Inseparable friends Clark Kent and Mr. Hyde, for two Clark Kent and Bruce Banner Very close friends Superheroes often have them Bruce Wayne and Batman, e.g. Superman and Mr. Hyde Trusted friends Constant companions (2 wds.) Bruce Wayne and Batman, e.g Inseparable friends (2 wds.)