Momodachi Kentonaku is one of three loyal companions that make up the Momodachi trio, alongside Momodachi Canbello and Momodachi Monkid, in the anime Duel Masters King. Together they serve as the faithful retainers of Momoking, a powerful fire dragon creature. According to the series’ lore, Kentonaku and the other Momodachi were brought into existence when Momoking and the storybook of Momotaro were merged, granting them life and purpose. They reside at the home of the protagonist, Joe Kirifuda, and help run the Takigawa coffee shop, blending into everyday life while remaining ready for duels and adventures.

Kentonaku’s personality is typically calm and steady within the group, often acting as a reliable and level-headed member. He is deeply loyal to Momoking and committed to his friends, showing a strong sense of duty and camaraderie. Over the course of the series, Kentonaku undergoes significant development through training alongside his fellow Momodachi and their partner, acquiring the power of Kirifuda ReVo and evolving into Spadachi Kentnerk R, an advanced form that allows them to influence the flow of time and play a pivotal role in the story’s climax. In combat, Kentonaku utilizes abilities such as Kirifudash, which allows him to rally creatures after shield breaks, and Mach Fighter, enabling swift attacks against tapped or untapped opponents. As a character, he represents the supportive retainer archetype, contributing both in battle and in daily life as part of the larger Duel Masters universe.