This is what he looks like.
Jay Jay the Jet Plane was the culminating result of somebody having his his mom Abandon him whenever he was six and then never left so he decided to start a TV show to look away from all of his sad depression because of his mother and father leaving and going on to have another kid without Jojo and then he started a reality TV show with his friends and then his friends left him and he is now the number one pop star features skinned off, bulbously enlarged and positioned dominantly, rigidly and uncannily on a piece of aircraft. He was then sent to nearby military airfield 'Terrytown' by some mentor who enslaved Jay Jay to serve man and to perpetrate countless acts of annihilation. In the airfield he met numerous, other volitant pieces of warcraft that suffered the same fate as Jay Jay did, and were all ordered to engage in malefactions. At one point Jay Jay was practically apprehended for bombing countless notable pieces of infrastructure in a city, thus causing them to obliterate. Jay Jay got away with this scot-free, as nobody ever managed to physically incarcerate him at the time.
Nobody really knows much for certain about the anatomy that surrounds Jay Jay the Jet Plane and other sentient airplanes of his own kind, and whether people can even ride inside of him, considering how his supposed 'windows' are only imprinted on both of his sides, or would want to know how they're able to reproduce or have any blood, brains, liver or bones or any other elaborate interiors, or even if they know how to give birth. Nevertheless, Jay Jay the Jet Plane has been said to have been a part of a huge, multinational military alliance that took place shortly after World War II. This military alliance was the largest of its kind to date, involving countless nations that banded together and used Jay Jay's body as a mobile and efficient means to deliver numerous nuclear weapons from one destination to another. This alliance even went as far as using Jay Jay's body as a mobile, military arsenal and delivering all sorts of nukes and rocket launchers, to many various targets in such a short amount of time.