Maido-kun, also known as Howdy in some English adaptations, is a distinctive member of the Ham-Ham club known for his hardworking nature and love of comedy. His background is tied to his living situation, as he resides in a convenience store with his owner, Goldie Houston, and her son Zack Houston, who also own a bird named Tattles. This environment suits his personality perfectly, as he is almost never seen without his shop apron and has a natural gift for tidying up spaces and handling financial matters, often pulling out a broom or an abacus to solve problems.

In terms of personality, Maido-kun is a tidy, hardworking hamster with a quirky sense of humor. He is known for cracking terrible jokes and puns at every opportunity, though his comedy often misses the mark with his friends. Ironically, the few times he gets a laugh are usually when he is not trying to be funny at all. A notable visual trait is that he is never depicted with his eyes open. His speech pattern is also unique; in the original Japanese version, he speaks with a Kansai dialect, which was localized into a Southern American accent in the English dub. This dialect choice reinforces his friendly, working-class character and adds to his comedic charm.

Maido-kun's primary motivation and central role in the story revolve around his social relationships, particularly his rivalry with his best friend, Dexter. The two share a complex friendship-rivalry; they are long-time best friends and neighbors who will protect each other in times of trouble, but they constantly argue and compete. The main source of their conflict is the affections of Pashmina, a female hamster whom they both have a crush on. However, Pashmina usually ignores their squabbling or finds it irritating. This rivalry is a recurring comedic element in the series. Another key relationship involves a hamster named Hannah, to whom Maido-kun is a childhood friend. He appears to have a significant affection for her, though in her debut, she shows more interest in the sophisticated Dexter.

Regarding his development and notable abilities, Maido-kun remains a consistent character throughout the series. He is always a reliable and cheerful figure, leveraging his practical skills to help the Ham-Hams. His innate gift for finance and his ability to clean and organize any room in minutes are his standout talents. He is a lower-class, joke-loving hamster whose steadfast nature and humorous, if often unsuccessful, one-liners make him an integral and beloved part of the group.