Hai Fong has short dark brown hair with wispy bangs. She is thin with pale skin and wears a white collared shirt along with silk trousers cut below the knee.
Her personality is mostly unknown, except for Hyo stating that she was a good woman and had dimples when she smiled. She was always shown happy to be with her family.
Hyo and Hai Fong were childhood friends. When Hyo asks if there's anyone she has her heart set on, she smiles and says there's no one. Eventually, the two get married and have a daughter.
After she's murdered, Hyo always goes around protecting mothers and children who are attacked by yokai, and makes it his life's purpose to get vengeance for her death.
Hai Fong happily takes care of Lei Xia in Hyo's memories. They appear to have a loving mother-and-daughter relationship.
Hai Fong spent most of her days doing household chores and caring for Lei Xia, while Hyo would work at a pharmacy. One day before Hyo heads to work, he warns Hai Fong about a strange beast that was seen in the area, and that she should be sure to lock the doors.
Hyo returns home after staying late at work and knocks on the door, but receives no response. Fearing the worst, he opens the door and his eye is slashed by a yokai that flew out of his house. He enters his house only to find a large puddle of blood, with Hai Fong and Lei Xia nowhere to be seen. All that remained was one of Lei Xia's shoes on the ground.
By going back in time with Tokisaka, Hyo witnesses Guren eating Hai Fong and Lei Xia. When Hyo finally manages to kill Guren and avenges his family's deaths, his spirit reunites with them. Hai Fong and Lei Xia's spirits welcome him home.
- ↑ 1.0 1.1 1.2 Chapter 17: Seal Magician Hyo Part 3, Hyo's Past
- ↑ 2.0 2.1 Gaiden Chapter 2: Tale of the Shadow on the Peach Tree ~ Seal Magician Hyo
- ↑ Chapter 244: Resurrection of the Beast Horde Part 6, Grudge
- ↑ Chapter 305: To the Promised Night <Second Part>