Izetta: The Last Witch - Season 1 Episode 4 The Secret of the Witch

With Izetta's victory over the Germanian army fresh in people's minds, the army of the Dukedom decides to make her into a national icon and announce her to the world. She's given the finest white dress they have to offer and a huge ceremony is arranged with journalists from all over the globe. But before she can be used in combat, they need to unravel the secret of her strength, which means she must travel to a hidden location with a girl who doesn't like her very much at all.