Katsudonman, sometimes called Mr. Cutlet in English adaptations, debuted in the 1989 film *The Shining Star's Tear* before joining the main series. He is the older brother of Tamagodonman and a core member of the Donburi Trio alongside Tendonman and Kamameshidon. His design includes a distinctive mustache, reflecting his role as one of the group's more intellectually oriented figures.

As the "smart one" of the trio, Katsudonman frequently explains situations or highlights observations. His speech features sporadic English phrases like "Yes!", "No!", "Shut up!", and "Oh My God!"—a nod to the British origins of pork cutlets in Japanese cuisine. Western adaptations occasionally alter or omit "Oh My God" due to cultural sensitivities in children's programming.

Katsudonman participates in the Donburi Trio's group activities, including comedic exchanges, treasure hunts, and collaborative songs. Despite his recurring presence, he anchors fewer than 10 solo-centric episodes beyond his debut, with several shared alongside Tamagodonman.

His relationships include an early romantic interest in Batako, later discontinued, and friendships with characters tied to Uncle Jam's bakery. He engages with broader ensembles during group plots. Within the trio, he occasionally mediates or relays information, contributing to their collective identity through rapid running and lid-based combat tactics.

No concrete details exist regarding his development in later media or spin-offs beyond his established group dynamics and traits.