A player becomes a Lover when they are chosen by a cupid, and forms an inseparable team with that cupid.
Details
During Night 1, each cupid must choose one player to become their Lover. The Lover is added to the cupid’s secret channel.
The Lover and their cupid form an inseparable team; they will die if the other player dies. When this happens it is announced that the lovers died.
The Lover keeps their role and the Cupid now shares their alignment.
The Lover’s love overrides any other mechanic that may cause a player to change alignment for any reason; the Lover is always on the same alignment as their cupid.
This is a role that is gained on top of your original role - it does not replace it.