"He was mine first!" Gai objected, defiant against that lifted-chin, pleased look that Obito's Uchiha features wore so well. "He is my Rival! My business! You had better not 'ruin him,' or you will be answering to me!"

To be honest, he knew that with whatever Obito had said, whatever changed Kakashi, Gai had lost some of his claim on his Rival. It hadn't quite occurred to him before how jealous that made him, or how unsure, and in the face of uncertainty, Gai put up a show of bravado.