Misery was a girl who was looking for answers... And souls. Everything in her life was a drag and a bore; nothing seemed satisfying. She was alone in a world of idiots and weaklings and wanted to kill herself... Until the day where she met Khrona. She was fascinated in Khrona... Mostly by his demeanor and how unstable he was. In order to attempt to have him prove himself to her further, she challenged him to a battle. She explained to him what a 'Soul Weapon' -- a Living Weapon -- was and wanted to see if he was able to wield her, since they were drawn together like this and she was without a 'Soulmate' to wield her in battle. Misery was impressed by how much he could actually handle himself -- and her -- in battle, which she soon found out was just the same in bed -- which she’d never ever experienced before, giving him even more of her respect as a succubus.
They connected via their own shared insanity, and with that, became quick friends and great partners, then eventually rather intimate and extremely loyal lovers. She may have been one of the only people that Khrona actually considered a friend after the family incidents, but that was only because Misery swore her life to stay by Khrona’s side -- because she loved him with all her heart, unlike anyone she'd ever met or known, even her own family. She embarked on a quest with him to help him get revenge and unlock his untold true power. She wished for the same within herself; to find herself completely and fully and unlock her own untold power... Show everyone what happens when they mess with her... Her main wish is to just be alone with Khrona and everyone else can go fuck themselves and die. All she needed was her family and her love, both of which were Khrona now.
For a while, Khrona and Misery were the dynamic duo everyone came to love and fear. The insanity that they shared with each other in their very souls bonded them together, but made them terrifying to be around -- especially with Misery's temper.