Roles as printed on the inlay of Chandos CHAN 10572(2), scanned in the rip: General (ex-soldier injured by guerrilla/terrorist attack), Sian (his daughter, a harpist who teaches music), Mal (reformed guerrilla/terrorist turned politician), Evan (Generals right-hand-man), Megan (Generals younger daughter). The same five are listed at https://en.wikipedia.org/wiki/The_Sacrifice_(opera).