The Alpha wolf Hee-Jin met her soulmate, Boong-Do, another Alpha, in South Korea before they moved to America to start their own wolf pack. Within ten years, the two of them had six children together, due to their strong bond as mates. Neither are particularly emotional, and expected their children to do great things as the progeny of two Alpha wolves.
All six of their children were born Alphas, but to their dismay, they only had one son, Pierce. They placed all their expectations and plans on him, urging him to be better than his sisters and ignoring their children's wants and needs.
Hee-Jin raised her daughters to be independent, but made it clear they were to find matches that would strengthen their pack, and would not accept anyone she didn't approve of.