On the TV series The Originals, a spinoff of the popular show The Vampire Diaries, brothers Klaus and Elijah Mikaelson were killed off, a move that signified the end for Klaus' redemption journey. Klaus and Elijah's deaths set up the foundations for Legacies.
Klaus also kills himself later on in the season when jumping up and impaling himself with a buffalo horn before the kugel wave can take him out. In the end of The Umbrella Academy season 3, Klaus is very much alive. The whole world is reset and, unfortunately, everyone loses their powers.
Frenemies, Former Enemies/Allies; Klaus possessed Alaric's body, Alaric killed Klaus while he was in his dark phase, Alaric wanted nothing to do with Klaus when his daughters are involved, Their daughters all go to the Salvatore Boarding School.
Alaric then stabs Elijah with the white oak ash dagger, seemingly killing him. It is later revealed however that the dagger has to remain in an Original to keep him dead.
Elena gives Rebekah her mother's necklace back, putting it on her. As Rebekah looks at herself in the mirror, Elena drives a stake through her back. Elena apologizes as Rebekah dies, but doesn't want to leave anything to chance. Later, Damon tells Elena she did the right thing.
Elijah Mikaelson: Elijah is the current husband of Elena Gilbert and the father of their son, Johnathan Mikaelson and an unnamed daughter. He is also the step-father of Jenna, Grayson, Zachary, Stefanie, and Sarah Salvatore. Elian Konstantinov: Elian is the former lover of Katherine and the biological father of Nadia.
Damon stakes Alaric
Damon mentioned he knew Alaric's wife and "found her delicious." Seeking revenge, Alaric traveled to the Salvatore house with a stake in hand. Damon tried to explain he didn't kill Alaric's wife before Alaric attacked him. In the fight, Damon got the stake and killed Alaric.
Alaric/Klaus takes Elena and Bonnie away and reveals them that he is Klaus.
On The Originals, Klaus found redemption before his death, sacrificing himself to save his daughter. Legacies revealed if Klaus found peace. In The Originals series finale, brothers Elijah and Klaus Mikaelson died, staking each other with White Oak, and the show's spinoff Legacies addressed what happened next.
After Klaus sacrificed himself to save the family Hayley spent five years raising Hope and searching for ways to bring their family back. Hayley kept Klaus' memory alive for Hope as she told her daughter things about her father such as his loyalty to his family and how much he loved her.
She tricks him into meeting Reginald where his dad then confirms that he's 'already dead' but later on he wakes up on the dance floor after being sent back to life. Klaus subsequently discovered that he was effectively immortal, resurrecting himself every time that he died.
Hayley sacrificed herself for her daughter, Hope. She wanted to protect her from Greta, who wanted Hope dead. The final few moments of the episode featured Hayley and Greta's bodies on fire after Hayley threw them outside, exposing them to sunlight. Since Hayley was no longer a werewolf, she perished in the flames.
In Girl in New Orleans, Hayley smiles when Rebekah say that she talked with Elijah and he asked her to take care of Hayley. Elijah and Hayley are reunited.
Freya could only resurrect Elijah because she placed his soul in her pendant. If she failed to do so she wouldn't have been able to. Hope can not use that spell to resurrect Klaus because Klaus isn't in Freya's pendant and circumstances aren't the same. Same with Davina resurrecting people.
Klaus: 982 AD (19)
Even though Alaric was only 18 years old when Hope was born, he never felt like she was holding him back. In fact, being a single father propelled Alaric to want a better future for his daughter. Up until her adoptive mother's death, Hope and Alaric had a deep father-daughter relationship.
Alaric is Elena's step-father and second legal guardian after Jenna. Alaric drank Elena's blood to become a vampire. Elena once killed Alaric, though she did so only to ensure he would return to life while wearing the Gilbert ring.
Perhaps the most noteworthy moment, and the biggest tearjerker, from the finale is the return of Joseph Morgan as Klaus Mikaelson. Fans have been clamoring for a Klaus appearance since Season 1 and, as Hope's father, it seemed only natural he'd find a way to see her even from the afterlife.
While Damon is already holding onto Katherine while waiting for the hellfire to kill both of them, Stefan injects the cure to Damon. Stefan saves Damon, who is now a human, and dies with Katherine.
Through overuse of the Gilbert Ring, Esther manipulated his spirit while he was on the Other Side before he would resurrect, and as a result he developed an alter ego, called The Darkness by Bonnie and Dark Alaric or Evil Alaric to others, that hated vampires and vampire sympathizers; as the Darkness, Alaric killed ...
Stefan Salvatore – 1000+ Times
He's one of the most selfless characters in the entire show, and yet Stefan still dies the most in The Vampire Diaries.
Somtime during season six of The Vampire Diaries, Elena give birth to her and Jacob's first and only child, Bonnie Rebekah Fogerty. They named their daughter in honor of their two friends, Bonnie Bennett and Rebekah Mikaelson.
Nikolaus Mikaelson is an Upgraded Original-Witch Hybrid. He is the son of Marcellus Mikaelson and Rebekah Mikaelson.
Black Hole Sun (The Vampire Diaries)