Definitely. The Joker has a long history in comics and is a staple villain. His character and storylines often evolve and branch out across different comic series and story arcs.
The Joker is definitely violent. His violence is a key part of his character, used to create chaos and terror. His methods can be very graphic and disturbing.
The Joker is typically not immortal in comics. His character is defined by his chaos and unpredictability, not by immortality. However, there might be alternate universes or special story arcs where his status could be different, but those are exceptions rather than the norm.
In many comic arcs, the Joker has survived numerous near-death experiences. His fate varies based on the creative direction of the writers and the demands of the story.
The movie Joker has its roots in the comic world. However, it reimagines and interprets the character in a unique and darker way, departing from some traditional comic storylines.