Yabiko Himegami, aka Yabiko Oyama, is the brother of of Kodama Himegami and the first ancestor of the Oyama line. He was the original creator/owner of Kamudo, and the killer of Takeru Yamato's original body.
Yabiko, like his father, was a persistent skirt-chaser, albeit less smooth than his father. He has a great love for big breasts, often refering to women as 'breasts' rather than 'girls' or 'ladies'. He also seemed oblivious to his sister's attraction to him, but confessed his (romantic) love for her and kissed her upon her imprisonment.