Rob Morgan
as Dr. Clayton "Teddy" Oglethorpe
Ariana Grande
as Riley Bina
Scott Mescudi
Yûrei Yanagi
as Toshio Murai
Yasuyo Shirashima
as Hitomi Kurokawa
Takanori Kikuchi
as Masaru Hayama
Sabu
as Sekikawa
Reita Serizawa
as Sadaoka
Hirofumi Kobayashi
as Shigeru Mochizuki