A tool for checking which traits a Wildermyth hero will or won't be compatible with. See Compatibility on the Wildermyth Wiki.
In the column on the left, select all personality traits that your hero has at least 50 in. Then the column on the right will display compatibility scores for each trait.
Then when looking at your second hero, sum the compatibility score of each personality trait they have at least 50 in. A pair of heroes with a positive compatibility score will make good lovers. A pair with a negative compatibility score will make good rivals.