|Японское имя:||鶴御崎 山海|
Blood Type: AB
Yamami Tsurumisaki is a junior of Class 13 and a former member of the Flask Plan's Plus Six. His project name is Star Master.
Tsurumisaki hates being around Normals and even compares them to garbage, a sentiment shared by his fellow member of the Plus Six, Shoko Kamimine. Like the rest of the Plus Six, he adds "Let's try and get along." after his introduction. Like the other members of the Plus Six, he is considered a basis for Class -13, having a personality that separated him even from other Abnormals.
Voiced by: Kenji Sugimura