This is the 8838th most frequent Russian word.
поттера
"Поттера" is not a standalone word in Russian; it is likely a transliteration of the English surname "Potter" (e.g., Harry Potter).
The word 'Поттера' is used genitively to show possession or relation, as the fans belong to Potter.
Фанаты Поттера собираются на мероприятии.
Fans of Potter are gathering at the event.
The word 'Поттере' is used in its locative case denoting the context of the person being discussed in the article.
Я прочитал интересную статью о Поттере.
I read an interesting article about Potter.
The word 'Поттера' here is in accusative case indicating that Potter is the direct object receiving the action of being invited.