In an interview, when asked about who is Ezmerelda, he said:

I’ve been to my children’s recitals at school, and whenever I’m seeing them I always start to fantasize, when I’m sitting in the crowd, about these kids just doing wild things, like some kid standing up and doing a clarinet solo without being asked. Or some other kid just doing a cartwheel, trying to steal the show. Just trying to imagine, wouldn’t it be amazing if this kid did a tuba solo right now? … What if this angelic girl said the most amazing thing?