Jason Todd (DC)

Jason Todd (commonly known as The Second Robin or The Second Red Hood) is a major character in the DC Franchise. Being a deuteragonist-turned-pivotal anti-heroic/villainous main antagonist for most of the franchises he is featured in and an occasional anti-heroical/villainous deuteragonist.

He was once the second Robin. And then he was killed and resurrected by Talia Al Gaul causing Todd to choose to become Red Hood to get back at his killer Joker and Batman. And due to this becoming Batman's occasional rival or ally depending on the story. He is the presumed culprit behind being the second Red X in the Teen Titans franchise. Although, it remains debatable since.

What makes him heroic?

 * In spite of his criminal behavior earlier on. He once chose to work as the second Robin with Batman.
 * As Red Hood, he does choose to take the life as a vigilante similar to Batman. Going after criminals which is debatably good just as much as evil.
 * He can work with Batman and his teammates some of the times.
 * Assuming he is Red X, he sometimes could work along Robin and help him fight against bigger threats.
 * In Injustice, he does defeat Braniac and still chooses to protect the city and fight against criminals.
 * In Death of the Wayne's, there are endings where he chooses to do good.

What makes him villainous?

 * He became more ruthless and harsh than Batman.
 * He became more naive with falling for Joker's trick that eventually led to his death.
 * His revival messed up his sanity making him more frustrated and wrathful with Batman, Joker, and many criminals.
 * If Jason Todd is the same to Red X as Teen Titans heavily implies. Then he had also taken the identity of Red X to taunt Robin and his team.
 * He idealizes extreme lengths where he brutally kills criminals and possibly mutilates them in Batman Under The Red Hood. Such as decapitating his enemies out of pride for his twisted sense of vengeance crossing moral event horizons that are no different to the villains he may challenge.
 * In Injustice he chooses to be a vigilante taking the law into his own hands.
 * In Three Jokers Comic, he tries to attack Jokerfied victims and tries to kill a Joker and succeeds upsetting Barbra.
 * In Batman: Death of the Wayne Family, there are many interactive endings where he chooses to do evil and become a villain on some endings.