The girl is one of the main heroines of harry potter. hermioneThe girl is one of the main heroines of Harry Potter. Hermione
The stand to one is in white fabric and decorated with white flowers on a background of a sea of blue skyThe stand to one is in white fabric and decorated with white flowers on a background of a sea of blue sky
Beautiful glazed one-storey house on the river bankBeautiful glazed one-storey house on the river bank
I am a guest at the mountains, at the very top of oneI am a guest at the mountains, at the very top of one
Без других, в отдельности. Тот же самый, тожественный. Единый, целостный. Число, цифра и количество 1. Какой-то, некий. Только, исключительно. Какой-нибудь в ряду сходных.