Can I use "of" instead of "from" here?
Native speaker’s answer
Rebecca
Excellent question. "Of" is used when talking about possession and "from" is generally used when talking about the origin, source or a starting point for something. In this case, the sisters are talking about the source of the ash that is on Cinderella. Because they are talking about a source, they have to use "from", it cannot be replaced by "of". Ex: The name of the movie. => (The movie's title - possessive). Ex: The name from the movie. => (A name which originated in the movie).