Izetta: The Last Witch (2016)

S1E1 Beginning of the War

Princess Finé, the young daughter of an alpine Archduke, journeys to the neutral territory of Westria in search of assistance against the invading Germanian empire threatening her homeland. However, her mission takes an unexpected turn when she is seized by the Germanians and flown back to their capital, Neu-Berlin. During the flight, a mysterious light flickers at the rear of the aircraft, heralding the awakening of a powerful witch.