'Linked' by Imogen Howson

Which minor character in this book would you like to know more about? If there were a whole book about them, what would it be called?
'Linked' by Imogen Howson is a book about a girl in a futuristic planet who finds out that she has a twin sister who has been hidden from her and kept in an institute for no reason other than being a twin.

If I could know more about any minor character in the book, I would want to know more about the twin sister to Elissa, the main character. If there was a book about her, it would be called 'twins'.
- Emi, Grade 6, Winsor School