fiance / fiancee
The man versus the woman engaged to be married.
Fiancé is the man. Fiancée is the woman. The accents mark the split. Fiance and fiancee without accents are common. Keep the two spellings if you name the sex. If you do not, write fiancé as the general form, or recast: her intended, his intended.
Examples
Useher fiancé
Usehis fiancée
Avoidher fiancée