Formerly, the two had an antagonistic relationship, but after his defeat of her, Godou gained Luo Hao's respect and she has pledged herself to be Godou's adopted older sister and teach him in the ways of being a Campione. There is some suggestion she also has developed a romantic interest in him.
Student, servant, and a disciple of Luo Hao; usually punishes him for even the tiniest mistake that she finds displeasure from him doing or saying. She gives very little praise (if any) to him, and is likely the reason he's a misogynist. She often forces him to undergo harsh training, which she knows is beyond his ability.
He is a Champione that live more than 200 years likes Luo Hou. The relationship they have until the devil king civil war was complete ignorance each other where Luo Hou stays in the deep mountain in China and Voban stay in eastern of Europe. In Devil king civil war their relationship changes it alliance to beat Kusanagi Godou and Salvatore Doni.