A Certain Magical Index, Vol. 29 (Manga) - Kazuma Kamachi

Concerned for England's future, the second princess of the British royal family, Carissa, launches a coup d'état! The first obstacle on her road to power--her younger sister, Vilian. However, before she can put her plan into motion, Acqua of the Back, member of God's Right Seat, stands in her way!!