Jason Todd (aka Robin II and Red Hood II) is one of DC Comics' most famous characters, and also one of the most important characters in the history of comics and popular fiction. Despite his iconic tenures as the second Robin and the violent vigilante The Red Hood, Jason left a permanent mark on the superhero genre when he died in 1988.
Source:https://www.cbr.com/jason-todd-robin-red-hood-dc-comics-guide/