Lu (voice)
Kai (voice)
Yuho (voice)
Kunio (voice)
Lu's Father (voice)
Teruo (voice) (as Kenichi Suzumura)
Isaki (voice) (as Shizuka Itô)
Chairman (voice)
President (voice)
Granny Octopus (voice)
Chief Priest of Shrine (voice)
Homeroom Teacher (voice)
Fuguda (voice)
Nodoguro (voice)
Kameda (voice)
Kujirai (voice)
Shiira (voice)
Chile Grandpa (voice)
Merdog (voice)
Esojima (voice) (as Daigo)
Higesoridai (voice) (as Nobu)
Mitsuryô seinen (voice)
Lu's Father (voice) (as Michael Alston Baley)
Homeroom Teacher (voice) (as H.D. Quinn)
Additional Voices (voice)
Additional Voices (voice) (as Noelle M. DePaula)
Grandfather (voice)
Esojima (voice)
(voice)
Kameda (voice) (as Raymond K. Essel)
President (voice) (as Joseph Whimms)
Isaki / Merpuppy (voice)
Additional Voices (voice) (as Michael Schneider)
Young Grandpa (voice) (as David Thompson)
Teruo (voice)