Not sure what exactly is being referred to with the "15 centuries" bit, but "yellow" is another way of saying 'coward' - the "yellow trickster and a thief" bit makes me think that he's talking about who he used to be, in relationships.
Not sure what exactly is being referred to with the "15 centuries" bit, but "yellow" is another way of saying 'coward' - the "yellow trickster and a thief" bit makes me think that he's talking about who he used to be, in relationships.