Takeo Yamashiro was born as the brother of Maseo Yamashiro. At some point, Takeo and Maseo met Tatsu Yamashiro, whose heart the brothers both competed for. However, Tatsu would eventually choose to marry Maseo, feeling rejected, Takeo refused to attend Maseo and Tatsu's wedding. Because of all this, Takeo joined the Yakuza, in which he rose through the ranks, in which one of his exotic tastes included ancient weapons. He was eventually presented with a pair of matched swords, one of which Takeo favored due to its mystical properties, which would come to be known as the Soultaker, because of its ability to trap the souls of its victims within itself. Takeo then spent days preparing himself before taking both swords to the Yamashiro residence, demanding his brother duel for the "prize" of Tatsu.
During the course of the struggle, a fire was started and, while Maseo was distracted by his children, Takeo killed him with the Soultaker. Tatsu arose just in time to see her husband die, and fiercely engaged Takeo, gaining the upper hand and disarming him.
- Maseo Yamashiro † - Brother
- Tatsu Yamashiro - Sister-in-Law turned Killer
- Yuki Yamashiro † - Niece
- Reiko Yamashiro † - Niece