Well, here's a rare one - this is Yuriko Hibiki, Dan's younger sister (in a parallel universe). She's a good-natured girl, who looks after her free-spirited brother while going to school. Apparently, she's a pitcher on a softball team.

A curious girl, she is quietly following her older brother as he travels around the world to promote the Saikyo style (she's so stealthy that neither Dan, the player, or even the dev staff is aware of her presence...).

Yuriko has no interest in martial arts herself, and wishes her brother would mellow out. Recognizing that he does have business sense, she dreams of one day running an internet shopping website together with him (parallel universe).