Re:ZERO -Starting Life in Another World- Ex, Vol. 5 (light novel)

In the Sacred Empire of Vollachia, largest of the Four Great Nations, the strong rise to
the top and the weak sink to the bottom. No one is exempt from this ironclad
mandate-not even the Emperor. Prisca Benedict, a discerning member of the Vollachian
royal family, is still but a child when she is thrust into the Emperor Selection Ceremony
to determine her father's successor. Now, she must face off against her own siblings in
a battle for the crown...where only one of them can make it out alive.