Gu Yirou and Gu Yining's father, Gu Feng, was the Lord of Huaxi City Base.
As a child, Gu Yirou was doted on by her parents and had a sweet, sheltered upbringing.
When Gu Yining was born, however, her mother experienced complications during childbirth and passed away soon after.
Growing up without a mother's love, she only had her older sister for company.
On top of that, just as she was old enough to start forming memories, the apocalypse began.
Gu Yining and Gu Yirou saw the world in completely different ways, which explained the vast difference in their personalities.
After the apocalypse, Gu Feng proved to be a capable Lord, dedicating himself to the welfare of his people, which left him with even less time for his own daughters.
For the most part, young Gu Yining was raised entirely by her older sister.
Gu Yirou's gentle, innocent nature gave her younger sister a great deal of strength and love.
