By an ancient prophecy, he was appointed Commander of The Resistance. Although he is often late for class aboard the Firebrand, his mech-battle experience makes him more qualified than other students to pilot the Colossus.
Navin was not in the car crash that killed his father—the rest of his family was going to retrieve him from an unspecified place when the car went off a cliff. Navin is often a voice of reason, though no one really listens to him at first. When he becomes Commander, however, he’s taken much more stricter.
Navin loves robots, flying, and seeing Emily laugh. Navin can be seen trying to make her laugh in the car in book one. He knows how much his father's death has changed Emily. Navin's personality is very different to Emily's while she being serious and determined, he tries to be easygoing and optimistic so that his sister doesn't get too worried about him. When he needs to, he can become a serious and determined fighter and an excellent strategist, especially when it comes to saving Emily. Navin cares about his family and wants to be with them. Although Navin doesn't show it as much as his sister, he misses his father as much as Emily.
Navin seems to express a deep interest with the machinery he encounters, including airships and robots. After coming to Alledia, he has shown to be a talented pilot after driving a small plane and steering the Luna Moth to safety during a storm, as well as piloting a mobilized Charnon House – skills that he apparently acquired from playing video games. He can also ride a bike, as seen in book eight, he's riding a bike with Aly. We haven't seen Navin show any other fight skills out side of robots.
Emily is Navin's older sister and main character in the series. Navin cares about his sister a lot and they have a strong relationship. As an older sister, Emily worry's about Navin and Navin tries to make sure Emily doesn't need to worry. Sometimes Navin complains when Emily takes charge and leaves him out because he is the youngest.
Karen Hayes is Navin's mother. Karen can be seen fussing about Navin, making sure he is clean and healthy. Navin loves his mother but sometimes he can be annoyed about her worrieing about him. Navin can be sometimes worried about his mother. Karen wants to go back to Earth, but Navin wants to stay with Emily. Not wanting to leave her children, Karen decides to stay with Navin and Emily.
We don't see Navin with David in the series, but we can hear David in Emily's dreams talking about him. David's death would have had an impact on him as much as Emily and Karen, even if he wasn't with them when he died. In book five Navin asks Alyson Hunter if her dad had always puts so much trust in her-Aly says she guesses and Navin responds saying that it must be nice to have her dad so close by.
- Navin has matured beyond his mostly childish personality seen in the first book.