コウペンちゃん

齋藤彩夏

Koupen-chan / Enaga Yokoshima-san (voice)

Sachi Kokuryu

Grown-up Penguin-san (voice)

Junji Majima

Adelie-san (voice)

Kazuya Ichijo

"Willing-to-teach type" Polar Bear-san (voice)