Alm-Onji  

, アルムおんじ

Heidis grandfather, Alm-Onji, resides in a modest cabin nestled within the alps. Although he may be perceived as bitter and hostile by those from towns or cities, his true nature is one of wisdom, love for mountains, and kindness towards Heidi. Despite any misunderstandings, Alm-Onji cherishes his time with Heidi and nurtures their relationship.