The Sidekicks Gael Monfils and Elina Svitolina's Relationship: All About the Tennis. The Swimmer. The Rebel. The Nerd. All Ryan, Harley, and Miles had in common was Isaac. They lived different lives, had different interests, and kept different secrets. But they shared the same best friend. They were sidekicks. And now that Isaac's gone, what does that make them? Will Kostakis, award winning author of The First Third, perfectly depicts the pain and pleasure of this teenage world, piecing together three points of view with intricate splendour.