Sonia

Sonia is a minor character from Toushin Toshi, who becomes Custom's first and biggest fan after he defeats Dogi in the opening round of the tournament. She provides him with encouragement and advice, including pointing Custom back to Yayoi's assistant Yukikaze for advice on how to defeat Yayoi.

While the devil Dalis was in control of Custom's body, she instigated a sexual encounter with Sonia.

Despite not being a participant in the Toushin Tournament, Sonia wears a chainmail bikini, which may imply that she is a warrior herself. Sonia is not seen after the touranment ends, which suggests she was a visiting tourist.