Although Elaina has no idea of the real truth about Adelaide, she assumes that Adelaide is what someone would call a "Gifted Child". Gifted children are considered to be children who gain something while they are still kids, which will result in them becoming geniuses or heroes once they grow to adulthood. And seeing Adelaide, she is a bit proud and also worried about her. Unlike her brother who will be living a normal life, she will become different from her peers and that might result in isolation and more and Elaina didn't want that to happen to her.