Nitrogen takes the appearance of a colorless, odorless liquid. Nitrogen acts entirely like a liquid, but what makes it quite unique is that it is a cryogen; it freezes anything it comes into contact with, and can also cause severe frostbite and cryogenic burns upon unprotected flesh. This makes Nitrogen both adaptable and dangerous; it's water properties allow it to be manipulated and controlled just like one would control water, but its cryogenic properties make it potentially lethal to be hit by it. This allows Nitrogen to be used with much less force compared to Water, which requires much more force to be lethal, but can also be used with much more innovation and flexibility than Ice.
Nitrogen has a complex nullifying relationship with the element IceFire. The elements of Fire and Water cancel each other out, leaving the Ice and resulting in the attacks canceling each other out, leaving just a chunk of ice.