The Fall of Five question

I was originally going to post this on "The Revenge of Seven", but I feared that not a lot of people had read it yet.

So, who is your favourite character in the books (up to the 5th, including the Lost Files)? At the 100th post, I will calculate the mode of all of the answers. So, be sure to reply quickly!

If you have TWO favourite characters, list them both. NO MORE THAN TWO!