Hiyariko (ヒヤリコ) is a character in the Anpanman anime.
Hiyariko is the assistant to the mad scientist Doctor Hiyari.
Hiyariko first appears in the 2008 movie's short. In this short, she gives Baikinman a spray of a potion that changes his size to huge, then transforms him into his baby form.
She appears probably only again in the 2008 Christmas special.