Junko Takeuchi as Toron (boy) (voice)

Kappei Yamaguchi as Zesta (voice)

Kengo Takanashi as Toron (adult) (voice)

Marina Watanabe as Sera (voice)

Miyuki Satou as Toron (baby) (voice)

Kenta Miyake as Zesta (voice)

Kentarō Hayami as Zesta (voice)

Mitsuo Senda as Grandpa Niko (voice)

Yumi Kakazu as Sparkle (voice)

Hiroaki Tajiri as First Triceratops Boss (voice)

Inori Minase as Mesomeso (voice)

Kappei Yamaguchi as Bard (voice)

Kunihiro Kawamoto as Jita (voice)

Masao Komaya as Guru (voice)

Nobuaki Kanemitsu as Gira (voice)

Reina Ueda as Triceratops Mother (voice)

Soichi Abe as Second Triceratops Boss (voice)

Takaaki Uchino as Ankylosaurus Boss (voice)

Tatsuya Miyanishi as Maiasaura (voice)