Origin
Mei Yamamoto is the cousin of Masumi. As a member of the Yamamoto clan, she has to do her training to handle the Legion Blades, currently in Masumi’s possession. Should Masumi die, the blades are transferred to Mei. But Mei thought they were just tales, so she didn’t do her training.
Engaged to Hiroto, she was about to be married. But her engagement was cut short when Hiroto was revealed to be a member of the Yakuza and was killed for trying to cut ties with them. On the run from the Yakuza, one of the Legion Blades got stolen by Ryujin, bodyguard of the man responsible for Hiroto’s death. Mei and Masumi tracked down Ryujin to get her blade back and take revenge on the Yakuza. In Masumi’s fight against Ruyjin, the Legion Blades got shattered, thus releasing the demon Legion.
Mei trained with Masumi, now battling evil together.