She too harbors a dragon, in which one could see as you finished Chapter One with her going berserk after [either Kanu or Hakufu defeats Sousou]. After Kanpei defeated Ryubi, her dragon seemingly woke up and managed to not only defeat Kanpei, but trash the Koumei dojo as well.
Ikkitousen: Eloquent Fist Edit. Kanpei first comes to the Kanto region as a person in search of the dragon's power, but then bumping into Chousen, a girl who is.
Images of the voice actors who play the voice of Kanpei in Ikki Tousen: Eloquent Fist (Video Game).