Because I was from the United Kingdom, they thought the word ninja was a little too mean for children, so they decided to call it hero instead.
전 영국 출신인데, 영국사람들은 아이들에게 닌자라는 단어는 건전하지 않다고 생각했죠. 그래서 닌자 대신 영웅이라고 했어요.