Final Book Cover Draft

It is hard to decide which two main female + male characters should I draw. I search a lots of them, such as Ikaros, Nymph, and Naruto. I think it might be weird that if I draw Ninja on it. My book is Maniac Magee, a book which talks about an orphan's life. I had no choice to choose other book because I did not read that much. Honestly, if you look at my bookshelf. You might see a lots of Chinese books but no English books. There are only 5  English novels in my bookshelf. =3= Finally I decide to use these two main characters for book cover. I wish I can have more homework about drawing stuffs. I start listen to OP songs which are awesome. I change everything into anime, include background and google's background. But not Skype and Messenger because I don't want other people think I am a weird guy like Hank(XD. I feel happier if I look at the background. If that"person" is real that will be fantastic...