Juri was always a headstrong woman who got what she wanted, like going to a normal school to see what it was like. Haruka was always quiet but quite persistent when he wanted to have a relationship with Juri. Both were of a pacifist ideology and followed their father's lead in believing in co-existence. This trait was then passed down to their children.
Since childhood, Juri Kuran had been fought over by both of her older brothers, Haruka and Rido. Although she never approved of a marriage to one of her brothers as a young girl, she eventually warmed up to Haruka after he insisted on annoying her until she finally loved him the way he loved her.
Throughout the 3000 years of their life, they had two children, Kaname and Yuki. Unfortunately, when Kaname was a baby, Rido sacrificed him to awaken the ancestor Kaname who then reversed to baby form and took baby Kaname's place. Despite losing their real son, Haruka and Juri raised Kaname the same as they would their own child.
When Rido declared war on them, Haruka bravely went out to fight him but died in the process. At this point Juri did what Haruka and her agreed to do if the time was right. She sacrificed her life and erased Yuki's memories to seal Yuki's vampire genes. Thus came to an end two of the most powerful vampires of their generation.