Is the Mysterious Girl a Mermaid Princess?!

Hideomi Nakazato

Kouhei Toba / B-Fighter Kabuto

Naoto Adachi

Kengo Tachibana / B-Fighter Kuwagar

Yukina Kurisu

Ran Ayukawa / B-Fighter Tentou

Ryoichi Yamaguchi

Masaru Osanai

Kaori Asoh

Yui Toba

Hideki Anzai

Li Wen

Akira Ooka

Dinosaur Warrior Raija

Akiko Yoshio

Insect Swordswoman Miola

Reuben Langdon

Mac Windy / B-Fighter Yanma

Reika Hashimoto

Sophie Villeneuve

Seiji Takaiwa

Julio Rivera

Ryo Horikawa

Pineappler (voice)

Misao Oka

Marina

Yoshiyuki Uchiyama

Swimming Club's Captain