Xenophilia - An attraction to foreign peoples, cultures, or customs.
Ted had only been at Hogwarts a matter of days when he first laid eyes on the Black Sisters. They were just coming round the corner of the corridor, the eldest in the centre, a half-pace ahead. Her younger sisters hovered at her shoulders, looking utterly at ease with themselves. The three of them were in perfect unison with one another.
That was what first drew Ted to them. He couldn't understand how three people, even three sisters, could be so in tune with one another.
It turned out that he would never stop being fascinated with the Black Sisters.