Niko is one half of our tale's protagonists. He is a bit of an airhead, but when things get bad, he is immediately able to get serious and fight with his heart and soul placed into every strike. Niko is a smart kid and is capable of something most can't say. Niko, while a bit bubble-headed, he's smart, strong, and capable of holding his own. When he was a child he lost all of his family and was adopted and looked after by Tails and Mina.
When Sapphire came into his life, he became stronger and felt a feeling that he and sapphire were meant for something great, but he'd have to tame her dangerous and hardened heart first. After defeating Herato, he had finally gotten Sapphire to be calmer and nicer. But when Xehanort attack and crashed their wedding, he knew he would have to get her to loosen up once again. But he also knew he'd also have to get serious about the predicament that befell them.