Croacker, identified as Gerozaimon Geroda in Japanese media and Kroaker in the Philippine-English dub, starts as a demon serving Takeshi Onimaru. Sent first against Yaiba Kurogane, Croacker faces defeat when Yaiba summons snakes. Deemed useless by Onimaru's forces, another demon is sent to eliminate him. This rejection prompts Croacker to defect and join Yaiba's group, forging a loyal bond. He wields an axe in combat and utilizes his prehensile tongue effectively, notably against a chameleon demon. His anime speech pattern mandates beginning or ending sentences with "Gero" (Japanese for "ribbit"), a trait absent in the Philippine-English dub where he speaks normally. The manga portrays him susceptible to depressive episodes, especially when feeling worthless. Learning of Onimaru's abandonment triggers despair and a violent attack on a Kuro Oni minion in blind rage. While integrating into Yaiba's team and participating in their adventures, Croacker's role after defection remains consistently comedic yet occasionally emotionally vulnerable. No documented spin-offs, movies, or OVAs provide additional details on his background, evolution, or significant development beyond the original anime and manga series.