Haku was born in a small, snowy village in the Land of Water, a land that had suffered from war not long before. In this war, different sides battled each other using ninja, some of whom possessed kekkei genkai. After the war ended, memories of the horrific battles still lingered in the minds of the people. Those with kekkei genkai quickly became feared and hated for their abilities, out of concern that their existence would only bring about more war.
Haku’s father and mother were simple farmers, and they lived a peaceful life. They loved each other, and were kind to their child. Unfortunately, this would all change. Haku’s mother was a carrier of a kekkei genkai: Ice Release. She hid this fact from her husband, hoping that the love and peace that was shared in their small family would last forever. One day, Haku discovered the ability to manipulate water. Amazed by this, Haku proudly showed this to his mother, who was horrified by what she saw. She harshly scolded and slapped Haku for displaying his ability, though she tearfully apologised to him afterwards. Unbeknownst to them, Haku’s father had seen everything from the shadows.
When Haku’s father discovered that his wife and child possessed a kekkei genkai, he assembled a small mob of villagers. With tears flowing down his eyes, he killed his wife. He then attempted to kill Haku. But before he could, Haku used his Ice Release to create several large ice spikes to kill his father and the rest of the mob.