11 Comic Book Characters Who Killed Their Loved Ones
6. Superman
In the continuity of the Injustice universe, Superman is positioned as the main 'big bad' who is intent on ruling with an iron first. The moment that cemented this heel turn was the Man of Steel killing the Joker by pulling out the Clown Prince of Crime's heart.
Given how Supes is so often the bright shining light of comics, this act was a jarring one - but it was one that you could perfectly understand the logic behind, even if you did think the Boy Scout went a little too far.
The reason for Superman killing the Joker, of course, is because the Jester of Genocide had duped Kal-El into killing Lois Lane. And not just Lois Lane, but the couple's unborn child whom Lois was carrying.
Using a mixture of Kryptonite and a fear toxin, Mr. J had Superman hallucinating and believing that Lois was actually Doomsday. With the Joker having rigged the trigger for a Metropolis-based warhead to Lois' heart, it's not only his 'one true' who dies when Superman kills "Doomsday", but the whole of Metropolis too.
While he wasn't aware of what he was doing, the Big Blue Boy Scout still tragically killed his wife and unborn child, plus countless millions of other innocents.