Kyle was a boy that Echo liked, and the main antagonist of Mr. Invisible.
He only appearance was in Mr. Invisible, where he and Echo where partnered to do a play for their History homework by Mrs. Byrne. Adam knew Echo liked Justin making him jealous of Justin. Using his new Invisibility Suit, Adam spied on them as they did their romantic play where Kyle was Sir Lancelot. He lashed out with his sword when they where practicing their play ( unknowingly hurting Adam under his invisibility cloak). Echo ( because she liked him) says she thought he was interested in her but he replied saying that she is out of his league and leaves, upsetting Echo.