There is not much information regarding Odr. The only known fact is that he is Freyja’s husband and that he is always away. One can only trade with assumptions and hypotheses as to Odr’s real story.  He is a god of mystery, a fleeting figure in the Norse Pantheon. Perhaps he had been conjured up as a secondary character to show Freyja’s strong emotions caused by his absence. But that is another guess and not something solid.