Unlike the titular Rider, who relies on biological transformation, Mei utilizes the IXA System

She acts as a mentor and emotional support for Wataru, unaware for much of the series that he is actually the hero, Kamen Rider Kiva. She has a younger brother, Mitsuhide Aso , who is also a benefactor of the Fangire hunters. Megumi Aso is portrayed by Yu Takahashi

In an interview with Artforum, Mei Asou revealed that her creative process often begins with a sense of curiosity and a desire to explore new ideas. "I'm always looking for ways to push the boundaries of what's possible," she explained. "I'm interested in creating art that challenges people's perceptions and inspires them to think differently."

The villagers, who had been using the Mei Asou waters for generations, smiled knowingly as they watched Emiko's transformation. They explained to her that the unique combination of minerals in the water was not only therapeutic but also rejuvenating.