In seconds, he had swept past Harry, Ron, and Hermione and detached Mrs. Norris from the torch bracket.
Potter, I think you’d better come with me …… Wondering how she could possibly suspect him this time, Harry saw Ron detach himself from the complaining crowd; he came running up to them as they set off toward the castle.
There are no more uses of "detach" in the book.
Show samples from other sources
She spoke in a cold, detached manner as though she didn’t care about him any more.
These days, she seems emotionally detached whenever she talks about him.