Nontan is a perky white kitten with a round, simple design that reflects his playful and approachable nature. The name itself comes from an expression of mischief, and true to that, he is described as adoring pranks and having an endless supply of energy. He is willful and sometimes selfish, initially ignoring friends who ask to share his swing or throwing a tantrum when he cannot win at cards, only to realize his behavior has driven everyone away. These moments of loneliness push him to understand the value of cooperation and friendship, showing that beneath his stubborn streak he is actually a kind and caring boy who wants to do right by those around him. His greatest treasures are a small red car and a red guitar, objects that symbolize his love for movement, music, and adventure.

As the main character of the series, Nontan serves as the audience’s guide through everyday situations that teach positive lessons about life, sharing, patience, and wonder. He explores his world alongside a group of distinct friends: the fun-loving Tanuki, the strong and protective Bear, the pink Rabbit triplets, and his friendly rival Pig. He also has a younger sister named Tartan, a slightly precocious girl with a love for ribbons who looks up to him greatly and often follows him around. His rivalry with Pig is marked by occasional teasing, but it stems from a strong sense of justice and mutual respect rather than genuine ill will.

Motivationally, Nontan is driven by a desire to play, explore, and have fun. His curiosity frequently leads him into small troubles, but these experiences become opportunities for growth. He may act tough or independent at first, but he is also a little timid inside, and he learns through each episode that asking for help and working together makes life more enjoyable. His development is subtle and episodic: each short story presents a conflict that teaches him a lesson about honesty, gratitude, or friendship, and he gradually becomes more thoughtful and considerate as a result. Notable abilities are not emphasized, as his strength lies not in special powers but in his lively spirit, his capacity to learn from mistakes, and his talent for turning ordinary play into a memorable adventure. Through his eyes, young viewers are encouraged to find the beauty and marvel in daily life.