Klaus and Elijah Mikaelson.

Family, half-siblings (previously strained relationship); former enemies/allies; Klaus repeatedly drove him away by stabbing Elijah off and on for centuries, they were somewhat estranged for seven years, Elijah (without his memories) resented Klaus because he has an idea of ​​what life was like with him before his memory loss, Klaus blamed and resented Elijah for Hayley's death (Elijah with his memories or not), they made peace shortly before their deaths, they both staked and killed each other with their consent. The brothers have frequently switched between being best friends and enemies and vice versa, due to Klaus constantly attacking his half-brothers. Elijah and Klaus eventually begin to repair their brotherly bonds during the third season of The Vampire Diaries . In The Originals , their relationship oscillates from partners in crime to enemies, usually depending on Klaus's mood. Upon returning to New Orleans , Klaus viewed his relationship with Elijah as a weakness that his enemies could exploit, and often took his frustrations out on Elijah as a result.