Heroes that have been or still are "lovers" of a villain or villainess. Whether it was true love, sexual relationship, marriage, an affair, or a one-time fling. These heroes can also have a love interest to a villain or villainess and wants to make the hero or heroine switch sides, or the villain can have a love interest in the hero or heroine and forces them to be their lovers. Some Purely Good heroes can also be the lovers of the villain(s)/villainess(es), but only if they don't switch sides and have no negative traits/qualities.

Examples of Villain's Lover include:

• Lucy considered to be the love interest of Rex Dangervest as Rex is her love interest Emmet Brickowski's evil future clone.
• Rey and Kylo Ren fall in love, with both attempting to make the other switch sides, but she eventually helps him to abandon the dark side of the Force.
• Christine Daaé is the love interest of Erik the Phantom in the many adaptations of The Phantom of the Opera, with her helping him to redeem himself in most versions and being his lover in Love Never Dies, the sequel of the original musical.
• Minnie Mouse is the ex-girlfriend to Mortimer Mouse, for she has to break up with him due to her strong relationship with Mickey Mouse.