Heavens Library & Crimson Lord brings back Arata, Lilith and the rest of the Trinity Seven to face off against the greatest enemy in the history of the Trinity Seven; Lilith’s own father, who is revealed to be the strongest Demon Lord who challenges Arata who is now a Demon Lord candidate.
Oh? So you're going to betray us after all.
إذًا ستقومين بخيانتنا بعد كلّ شيء؟
Oh, willst du uns nun doch verraten?
Vaya, ¿al final sí nos traicionarás?
Vaya, ¿al final nos traicionarás?
Oh? Quindi avevi comunque intenzione 
di tradirci alla fine.
Hã? Então você vai nos trair afinal.