Flashback 1: Sarah Hiwatari
Kai knew Sarah since the Magne era. He was the one to help her when her blade was crushed. He didn't know that her tribe was American Indian, neither did he know that these mountains used to be the home of Dranzer. When he created the new blade, he considered her with contempt because she was weak. But in her blade, there was a bit power. When she battled Takao though, her bit power showed itself as Thunder Spirit. Kai later grew to like her, and they had a daughter named Julia. Little did he know, that his life would be changed by a little baby girl...