Gaffer, known as Taifu in Japanese media, is Arashi's grandfather and Ikazuchi's father. He resides in Inaka Village and raises Arashi after Ikazuchi departs. Gaffer opposes Arashi's ambition to become a Zoid Seeker, citing the role's dangers due to his protective nature and Ikazuchi's departure.

Outwardly brash and stern, particularly toward Arashi, he expresses disapproval through strictness and physical punishments within the manga. Despite this, he shows deep care and hospitality to his community. His relationship with Arashi involves mutual respect and concern, often unspoken. Arashi hesitates to leave the village primarily to avoid abandoning Gaffer, reflecting their strong bond. Gaffer's strictness thus stems from care and fear for Arashi's safety.

Regarding Ikazuchi, their relationship receives less direct focus. Ikazuchi's prolonged absence causes him concern that Gaffer may have died of old age. Arashi reassures Ikazuchi of Gaffer's continued well-being and physical fitness, confirming he maintained his health during Ikazuchi's travels. Gaffer's role and character remain consistent across other official media without significant development beyond the main anime and manga narratives.