How they react to your death - The Mikaelsons
You were the only person who was there for Klaus unconditionally, regardless on whether you believed he was in the wrong, you would never turn your back on him, you loved him and in his millennium on earth he had never met someone as unique and special to him,as you. Klaus reacted as expected when you were taken from him, initially he lashed out at those close to him, he blamed himself for what had happened for you and for introducing you to the danger and chaos within his life. But eventually Klaus began to see that his destruction and rage would not be what you wished for him, he began to support those who were close to you and carried out your wishes as you would have done had you been around to fulfill them yourself.
Elijah considered you a sister, he felt he could turn to you whatever his situation, whether it be an oh so often rist with Klaus or your opinion and advise regarding Haley he knew you would be there for him to offer your support and your honest opinion. For this reason when you died Elijah felt lost, he no longer had anyone to turn to, in fact when he learned of your death it was you he needed to talk to, to seek refuge from the horror which had occurred, it was clear to him not he nor his family would recover from your loss for quite some time. While he maintained his strong and collected manner within the public domain, behind closed doors he let himself go. Elijah would turn to Haley to relive his experiences with you and keep you alive within his memory.
You were Rebekah’s best friend, you offered her someone to vent to when Klaus had stepped out of line, a shoulder to cry on during a feud with Marcel, but more importantly, someone she could go out with and let go of all of her worries regarding New Orleans and the Mikaelson family drama which.seemingly followed her around wherever she went. After your death Rebekah no longer went out, she couldn’t let got because she felt she was betraying your memory, she had pushed Marcel away and for a time, blamed Klaus for your death.
When Kol had returned to his vampire form you helped him to control his hunger and bloodlust, you were an ear to listen to him when he felt excluded from his family and he also looked to you for advise when it came to making Davina happy, When you died he became further estranged from his family as you helped to unite them so without your support he found himself alone. Kol became a monster. With no one to keep his bloodlust in check he devoured entire towns full of people with little remorse.