Liese, the last Trinity Seven, appears in the Eternal Library bearing a demon lord seal, making her a demon lord candidate, as well. She tries to entice Arata to join the evil mage side to help save Hijiri, and kisses Arata while he's unsure what to do. Arata has his magic stolen from him, and Liese decides to attack the school.
You need my magic to help defeat Liese?
Du brauchst meine Magie,
um Liese zu besiegen?
¿Necesitan mi magia para derrotar a Liese?
¿Necesitáis mi magia para derrotar a Liese?
Vous avez besoin de mes pouvoirs
pour battre Liese ?
Hai bisogno della mia magia 
per sconfiggere Liese?
Precisa da minha magia para derrotar a Liese?