None. It is implied some male pilots may have a crush on one of the female ones, but nothing ever really comes of this.

Standard action violence like you would expect in a typical children's action show. Explosions, machine guns/missiles firing, and planes malfunctioning are about as severe as the violence goes. Characters are usually seen ejecting or escaping from their planes, though.

In at least one episode a character is shown firing a gun, however he does this to intimidate people into serving him, he never actually shoots anyone.

Nothing really aside from the standard "childish name calling" that surfaces in shows like this.

None

Pilots are often in perilous, dangerous situations, but always escape any serious harm.