Love is enough- Les Mis fanfic/Enjolras

Felicité Thénardier. Twin sister of Éponine, sister to Gavroche and daughter of the master of the house and his mistress. She had always lived an unhappy life, taking on the role of Cosette once she left and only when her brother and sister join the revolution did her life begin to change.

And all because of a man dressed in dark red...

Canon era with parts of modern era