superman
Superman, AKA Clark Kent
Commonly accepted first superhero is 'Mandrake The Magician'(1934) by Lee Falk. And the second superhero is 'Phantom'(1936) by Lee Falk. He was the first superhero to wear a costume.
Along with Superman, Batman is the most famous DC Comics superhero.
He is a good guy - a superhero in fact...
Indeed there is. go on google images
Super man
Presumably any superhero could if they had Kryptonite.
Most commonly known is Superman. Others include other krptonians such as Krypto, Superboy & Supergirl.
SuperMan
dc's SUPERMAN!
batman
If someone lost the key to the vault containing kryptonite, it could potentially pose a danger if the kryptonite fell into the wrong hands. Kryptonite is a fictional mineral that is known to weaken Superman, a popular superhero character. If someone were to access the kryptonite without proper precautions, it could be used against Superman or other individuals with similar vulnerabilities.
Because Batman and the DC villains are hogging all the kryptonite.
batman
none
Wonderwoman
Yes, there is a superhero called Hawkman. Hawkman is a character from DC Comics known for his wings and ability to fly. He is often depicted as a reincarnation of an ancient Egyptian prince.