Roger's new move, 【火之迦具土惠士 (Hinokagutsuchi no Eisu)】, is derived from the ancient Japanese mythological figure "火之迦具土神 (Hinokagutsuchi no Kami)," the god of fire, responsible for fire, forging, and volcanic activity. He symbolizes destruction and rebirth, wielding a sword, and is the son of Izanami and Izanagi. However, he killed his mother, Izanami, at birth (this is the source of the term 【神避】, which refers to the death of a deity, specifically Izanami's death in the ancient mythology).

The final word replaces "kami" (god) with "eisu" (惠士), a homophone of "Ace" (meaning "with a god"). In short, it's the fire god Ace.

Furthermore, it was previously revealed that Roger's sword was the Supreme Grade Sword "Ace." This indicates that Roger named his son after his sword and fighting style.